diff --git a/CHANGELOG.md b/CHANGELOG.md
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,10 @@
 # Change log
 
+## 0.2.0.0
+
+* Deprecate `(.@)` in favor of `(.=)` from `aeson`
+* Re-export `(.=)` from `aeson`
+
 ## 0.1.0.1
 
 * Relax lower bound on `base`: 4.14.3.0 -> 4.14.0.0
diff --git a/README.md b/README.md
--- a/README.md
+++ b/README.md
@@ -81,7 +81,7 @@
 We'll opt for the former here:
 
 ```haskell
-logDebug $ "Doing stuff" :# ["x" .@ x]
+logDebug $ "Doing stuff" :# ["x" .= x]
 ```
 
 Note that the `logInfo` call did not give us a compiler error, as `Message` has
diff --git a/app/readme-example.hs b/app/readme-example.hs
--- a/app/readme-example.hs
+++ b/app/readme-example.hs
@@ -8,7 +8,7 @@
 
 doStuff :: (MonadLogger m) => Int -> m ()
 doStuff x = do
-  logDebug $ "Doing stuff" :# ["x" .@ x]
+  logDebug $ "Doing stuff" :# ["x" .= x]
 
 main :: IO ()
 main = do
diff --git a/library/Control/Monad/Logger/Aeson.hs b/library/Control/Monad/Logger/Aeson.hs
--- a/library/Control/Monad/Logger/Aeson.hs
+++ b/library/Control/Monad/Logger/Aeson.hs
@@ -55,6 +55,9 @@
   , defaultLogStr
   , defaultHandleFromLevel
 
+    -- * Re-exports from @aeson@
+  , (.=)
+
     -- * Re-exports from @monad-logger@
   , module Log
   ) where
@@ -90,7 +93,7 @@
 import Control.Monad.Logger.Aeson.Internal
   ( LoggedMessage(..), Message(..), OutputOptions(..), (.@), KeyMap
   )
-import Data.Aeson (Value(String))
+import Data.Aeson (KeyValue((.=)), Value(String))
 import Data.Aeson.Types (Pair)
 import Data.Text (Text)
 import Data.Time (UTCTime)
@@ -219,14 +222,14 @@
 -- subsequently logged from our endpoint handler will automatically include that
 -- request ID:
 --
--- > import Control.Monad.Logger.Aeson ((.@), withThreadContext)
+-- > import Control.Monad.Logger.Aeson ((.=), withThreadContext)
 -- > import Network.Wai (Middleware)
 -- > import qualified Data.UUID.V4 as UUID
 -- >
 -- > addRequestId :: Middleware
 -- > addRequestId app = \request sendResponse -> do
 -- >   uuid <- UUID.nextRandom
--- >   withThreadContext ["requestId" .@ uuid] do
+-- >   withThreadContext ["requestId" .= uuid] do
 -- >     app request sendResponse
 --
 -- If we're coming from a Java background, it may be helpful for us to draw
@@ -466,7 +469,7 @@
 -- >
 -- > doStuff :: (MonadLogger m) => Int -> m ()
 -- > doStuff x = do
--- >   logDebug $ "Doing stuff" :# ["x" .@ x]
+-- >   logDebug $ "Doing stuff" :# ["x" .= x]
 -- >
 -- > main :: IO ()
 -- > main = do
diff --git a/library/Control/Monad/Logger/Aeson/Internal.hs b/library/Control/Monad/Logger/Aeson/Internal.hs
--- a/library/Control/Monad/Logger/Aeson/Internal.hs
+++ b/library/Control/Monad/Logger/Aeson/Internal.hs
@@ -101,15 +101,15 @@
 keyMapUnion :: KeyMap v -> KeyMap v -> KeyMap v
 keyMapUnion = AesonCompat.union
 
--- | Synonym for '.=' from @aeson@.
+-- | Synonym for '(.=)' from @aeson@.
 --
--- We export this synonym rather than directly exporting '.=' to avoid clashing
--- if the user has open-imported both "Control.Monad.Logger.Aeson" and
--- "Data.Aeson".
+-- This operator is deprecated and will be removed in a future version. Please
+-- use '(.=)' instead, which is re-exported from "Data.Aeson".
 --
 -- @since 0.1.0.0
 (.@) :: (KeyValue kv, ToJSON v) => Key -> v -> kv
 (.@) = (.=)
+{-# DEPRECATED (.@) "This operator will be removed in a future major version." #-}
 
 -- | This type is the Haskell representation of each JSON log message produced
 -- by this library.
@@ -178,29 +178,29 @@
 instance ToJSON LoggedMessage where
   toJSON loggedMessage =
     Aeson.object $ Maybe.catMaybes
-      [ Just $ "time" .@ loggedMessageTimestamp
-      , Just $ "level" .@ logLevelToText loggedMessageLevel
+      [ Just $ "time" .= loggedMessageTimestamp
+      , Just $ "level" .= logLevelToText loggedMessageLevel
       , case loggedMessageLoc of
           Nothing -> Nothing
-          Just loc -> Just $ "location" .@ locToJSON loc
+          Just loc -> Just $ "location" .= locToJSON loc
       , case loggedMessageLogSource of
           Nothing -> Nothing
-          Just logSource -> Just $ "source" .@ logSource
+          Just logSource -> Just $ "source" .= logSource
       , if loggedMessageThreadContext == mempty then
           Nothing
         else
-          Just $ "context" .@ Object loggedMessageThreadContext
-      , Just $ "message" .@ messageJSON
+          Just $ "context" .= Object loggedMessageThreadContext
+      , Just $ "message" .= messageJSON
       ]
     where
     locToJSON :: Loc -> Value
     locToJSON loc =
       Aeson.object
-        [ "package" .@ loc_package
-        , "module" .@ loc_module
-        , "file" .@ loc_filename
-        , "line" .@ fst loc_start
-        , "char" .@ snd loc_start
+        [ "package" .= loc_package
+        , "module" .= loc_module
+        , "file" .= loc_filename
+        , "line" .= fst loc_start
+        , "char" .= snd loc_start
         ]
       where
       Loc { loc_filename, loc_package, loc_module, loc_start } = loc
@@ -208,11 +208,11 @@
     messageJSON :: Value
     messageJSON =
       Aeson.object $ Maybe.catMaybes
-        [ Just $ "text" .@ loggedMessageText
+        [ Just $ "text" .= loggedMessageText
         , if loggedMessageMeta == mempty then
             Nothing
           else
-            Just $ "meta" .@ Object loggedMessageMeta
+            Just $ "meta" .= Object loggedMessageMeta
         ]
 
     LoggedMessage
@@ -267,8 +267,8 @@
 --
 -- @
 -- 'Control.Monad.Logger.Aeson.logDebug' $ "Some log message with metadata" ':#'
---   [ "bloorp" '.@' (42 :: 'Int')
---   , "bonk" '.@' ("abc" :: 'Text')
+--   [ "bloorp" '.=' (42 :: 'Int')
+--   , "bonk" '.=' ("abc" :: 'Text')
 --   ]
 -- @
 --
@@ -447,7 +447,7 @@
 
 messageSeries :: Message -> Series
 messageSeries message =
-  "text" .@ messageText
+  "text" .= messageText
     <> ( if null messageMeta then
            mempty
          else
@@ -460,7 +460,7 @@
 pairsEncoding = Aeson.pairs . pairsSeries
 
 pairsSeries :: [Pair] -> Series
-pairsSeries = mconcat . fmap (uncurry (.@))
+pairsSeries = mconcat . fmap (uncurry (.=))
 
 levelEncoding :: LogLevel -> Encoding
 levelEncoding = Aeson.text . logLevelToText
diff --git a/monad-logger-aeson.cabal b/monad-logger-aeson.cabal
--- a/monad-logger-aeson.cabal
+++ b/monad-logger-aeson.cabal
@@ -5,7 +5,7 @@
 -- see: https://github.com/sol/hpack
 
 name:           monad-logger-aeson
-version:        0.1.0.1
+version:        0.2.0.0
 synopsis:       JSON logging using monad-logger interface
 description:    @monad-logger-aeson@ provides structured JSON logging using @monad-logger@'s
                 interface.
diff --git a/package.yaml b/package.yaml
--- a/package.yaml
+++ b/package.yaml
@@ -1,5 +1,5 @@
 name: monad-logger-aeson
-version: '0.1.0.1'
+version: '0.2.0.0'
 github: "jship/monad-logger-aeson"
 license: MIT
 license-file: LICENSE.md
diff --git a/test-suite/TestCase/LogDebug/MetadataNoThreadContextYes.hs b/test-suite/TestCase/LogDebug/MetadataNoThreadContextYes.hs
--- a/test-suite/TestCase/LogDebug/MetadataNoThreadContextYes.hs
+++ b/test-suite/TestCase/LogDebug/MetadataNoThreadContextYes.hs
@@ -7,7 +7,7 @@
   ) where
 
 import Control.Monad.Logger.Aeson
-  ( (.@), Loc(..), LogLevel(..), LoggedMessage(..), logDebug, withThreadContext
+  ( (.=), Loc(..), LogLevel(..), LoggedMessage(..), logDebug, withThreadContext
   )
 import Data.Aeson.QQ.Simple (aesonQQ)
 import Data.Time (UTCTime(..))
@@ -19,7 +19,7 @@
 testCase logFilePath =
   TestCase
     { actionUnderTest = do
-        withThreadContext ["reqId" .@ ("74ec1d0b" :: String)] do
+        withThreadContext ["reqId" .= ("74ec1d0b" :: String)] do
           logDebug "No metadata"
     , logFilePath
     , expectedValue =
@@ -67,7 +67,7 @@
           , loggedMessageLogSource = Nothing
           , loggedMessageThreadContext =
               Internal.keyMapFromList
-                [ "reqId" .@ ("74ec1d0b" :: String)
+                [ "reqId" .= ("74ec1d0b" :: String)
                 ]
           , loggedMessageText = "No metadata"
           , loggedMessageMeta = Internal.emptyKeyMap
diff --git a/test-suite/TestCase/LogDebug/MetadataYesThreadContextNo.hs b/test-suite/TestCase/LogDebug/MetadataYesThreadContextNo.hs
--- a/test-suite/TestCase/LogDebug/MetadataYesThreadContextNo.hs
+++ b/test-suite/TestCase/LogDebug/MetadataYesThreadContextNo.hs
@@ -5,7 +5,7 @@
   ( testCase
   ) where
 
-import Control.Monad.Logger.Aeson ((.@), Loc(..), LogLevel(..), LoggedMessage(..), Message(..), logDebug)
+import Control.Monad.Logger.Aeson ((.=), Loc(..), LogLevel(..), LoggedMessage(..), Message(..), logDebug)
 import Data.Aeson.QQ.Simple (aesonQQ)
 import Data.Time (UTCTime(..))
 import TestCase (TestCase(..))
@@ -17,8 +17,8 @@
   TestCase
     { actionUnderTest = do
         logDebug $ "With metadata" :#
-          [ "a" .@ (42 :: Int)
-          , "b" .@ ("x" :: String)
+          [ "a" .= (42 :: Int)
+          , "b" .= ("x" :: String)
           ]
     , logFilePath
     , expectedValue =
@@ -69,8 +69,8 @@
           , loggedMessageText = "With metadata"
           , loggedMessageMeta =
               Internal.keyMapFromList
-                [ "a" .@ (42 :: Int)
-                , "b" .@ ("x" :: String)
+                [ "a" .= (42 :: Int)
+                , "b" .= ("x" :: String)
                 ]
           }
     }
diff --git a/test-suite/TestCase/LogDebug/MetadataYesThreadContextYes.hs b/test-suite/TestCase/LogDebug/MetadataYesThreadContextYes.hs
--- a/test-suite/TestCase/LogDebug/MetadataYesThreadContextYes.hs
+++ b/test-suite/TestCase/LogDebug/MetadataYesThreadContextYes.hs
@@ -7,7 +7,7 @@
   ) where
 
 import Control.Monad.Logger.Aeson
-  ( (.@), Loc(..), LogLevel(..), LoggedMessage(..), Message(..), logDebug, withThreadContext
+  ( (.=), Loc(..), LogLevel(..), LoggedMessage(..), Message(..), logDebug, withThreadContext
   )
 import Data.Aeson.QQ.Simple (aesonQQ)
 import Data.Time (UTCTime(..))
@@ -19,10 +19,10 @@
 testCase logFilePath =
   TestCase
     { actionUnderTest = do
-        withThreadContext ["reqId" .@ ("74ec1d0b" :: String)] do
+        withThreadContext ["reqId" .= ("74ec1d0b" :: String)] do
           logDebug $ "With metadata" :#
-            [ "a" .@ (42 :: Int)
-            , "b" .@ ("x" :: String)
+            [ "a" .= (42 :: Int)
+            , "b" .= ("x" :: String)
             ]
     , logFilePath
     , expectedValue =
@@ -74,13 +74,13 @@
           , loggedMessageLogSource = Nothing
           , loggedMessageThreadContext =
               Internal.keyMapFromList
-                [ "reqId" .@ ("74ec1d0b" :: String)
+                [ "reqId" .= ("74ec1d0b" :: String)
                 ]
           , loggedMessageText = "With metadata"
           , loggedMessageMeta =
               Internal.keyMapFromList
-                [ "a" .@ (42 :: Int)
-                , "b" .@ ("x" :: String)
+                [ "a" .= (42 :: Int)
+                , "b" .= ("x" :: String)
                 ]
           }
     }
diff --git a/test-suite/TestCase/LogDebugNS/MetadataNoThreadContextYes.hs b/test-suite/TestCase/LogDebugNS/MetadataNoThreadContextYes.hs
--- a/test-suite/TestCase/LogDebugNS/MetadataNoThreadContextYes.hs
+++ b/test-suite/TestCase/LogDebugNS/MetadataNoThreadContextYes.hs
@@ -7,7 +7,7 @@
   ) where
 
 import Control.Monad.Logger.Aeson
-  ( (.@), Loc(..), LogLevel(..), LoggedMessage(..), logDebugNS, withThreadContext
+  ( (.=), Loc(..), LogLevel(..), LoggedMessage(..), logDebugNS, withThreadContext
   )
 import Data.Aeson.QQ.Simple (aesonQQ)
 import Data.Time (UTCTime(..))
@@ -19,7 +19,7 @@
 testCase logFilePath =
   TestCase
     { actionUnderTest = do
-        withThreadContext ["reqId" .@ ("74ec1d0b" :: String)] do
+        withThreadContext ["reqId" .= ("74ec1d0b" :: String)] do
           logDebugNS "tests" "No metadata"
     , logFilePath
     , expectedValue =
@@ -68,7 +68,7 @@
           , loggedMessageLogSource = Just "tests"
           , loggedMessageThreadContext =
               Internal.keyMapFromList
-                [ "reqId" .@ ("74ec1d0b" :: String)
+                [ "reqId" .= ("74ec1d0b" :: String)
                 ]
           , loggedMessageText = "No metadata"
           , loggedMessageMeta = Internal.emptyKeyMap
diff --git a/test-suite/TestCase/LogDebugNS/MetadataYesThreadContextNo.hs b/test-suite/TestCase/LogDebugNS/MetadataYesThreadContextNo.hs
--- a/test-suite/TestCase/LogDebugNS/MetadataYesThreadContextNo.hs
+++ b/test-suite/TestCase/LogDebugNS/MetadataYesThreadContextNo.hs
@@ -5,7 +5,7 @@
   ( testCase
   ) where
 
-import Control.Monad.Logger.Aeson ((.@), Loc(..), LogLevel(..), LoggedMessage(..), Message(..), logDebugNS)
+import Control.Monad.Logger.Aeson ((.=), Loc(..), LogLevel(..), LoggedMessage(..), Message(..), logDebugNS)
 import Data.Aeson.QQ.Simple (aesonQQ)
 import Data.Time (UTCTime(..))
 import TestCase (TestCase(..))
@@ -17,8 +17,8 @@
   TestCase
     { actionUnderTest = do
         logDebugNS "tests" $ "With metadata" :#
-          [ "a" .@ (42 :: Int)
-          , "b" .@ ("x" :: String)
+          [ "a" .= (42 :: Int)
+          , "b" .= ("x" :: String)
           ]
     , logFilePath
     , expectedValue =
@@ -70,8 +70,8 @@
           , loggedMessageText = "With metadata"
           , loggedMessageMeta =
               Internal.keyMapFromList
-                [ "a" .@ (42 :: Int)
-                , "b" .@ ("x" :: String)
+                [ "a" .= (42 :: Int)
+                , "b" .= ("x" :: String)
                 ]
           }
     }
diff --git a/test-suite/TestCase/LogDebugNS/MetadataYesThreadContextYes.hs b/test-suite/TestCase/LogDebugNS/MetadataYesThreadContextYes.hs
--- a/test-suite/TestCase/LogDebugNS/MetadataYesThreadContextYes.hs
+++ b/test-suite/TestCase/LogDebugNS/MetadataYesThreadContextYes.hs
@@ -7,7 +7,7 @@
   ) where
 
 import Control.Monad.Logger.Aeson
-  ( (.@), Loc(..), LogLevel(..), LoggedMessage(..), Message(..), logDebugNS, withThreadContext
+  ( (.=), Loc(..), LogLevel(..), LoggedMessage(..), Message(..), logDebugNS, withThreadContext
   )
 import Data.Aeson.QQ.Simple (aesonQQ)
 import Data.Time (UTCTime(..))
@@ -19,10 +19,10 @@
 testCase logFilePath =
   TestCase
     { actionUnderTest = do
-        withThreadContext ["reqId" .@ ("74ec1d0b" :: String)] do
+        withThreadContext ["reqId" .= ("74ec1d0b" :: String)] do
           logDebugNS "tests" $ "With metadata" :#
-            [ "a" .@ (42 :: Int)
-            , "b" .@ ("x" :: String)
+            [ "a" .= (42 :: Int)
+            , "b" .= ("x" :: String)
             ]
     , logFilePath
     , expectedValue =
@@ -75,13 +75,13 @@
           , loggedMessageLogSource = Just "tests"
           , loggedMessageThreadContext =
               Internal.keyMapFromList
-                [ "reqId" .@ ("74ec1d0b" :: String)
+                [ "reqId" .= ("74ec1d0b" :: String)
                 ]
           , loggedMessageText = "With metadata"
           , loggedMessageMeta =
               Internal.keyMapFromList
-                [ "a" .@ (42 :: Int)
-                , "b" .@ ("x" :: String)
+                [ "a" .= (42 :: Int)
+                , "b" .= ("x" :: String)
                 ]
           }
     }
diff --git a/test-suite/TestCase/LogError/MetadataNoThreadContextYes.hs b/test-suite/TestCase/LogError/MetadataNoThreadContextYes.hs
--- a/test-suite/TestCase/LogError/MetadataNoThreadContextYes.hs
+++ b/test-suite/TestCase/LogError/MetadataNoThreadContextYes.hs
@@ -7,7 +7,7 @@
   ) where
 
 import Control.Monad.Logger.Aeson
-  ( (.@), Loc(..), LogLevel(..), LoggedMessage(..), logError, withThreadContext
+  ( (.=), Loc(..), LogLevel(..), LoggedMessage(..), logError, withThreadContext
   )
 import Data.Aeson.QQ.Simple (aesonQQ)
 import Data.Time (UTCTime(..))
@@ -19,7 +19,7 @@
 testCase logFilePath =
   TestCase
     { actionUnderTest = do
-        withThreadContext ["reqId" .@ ("74ec1d0b" :: String)] do
+        withThreadContext ["reqId" .= ("74ec1d0b" :: String)] do
           logError "No metadata"
     , logFilePath
     , expectedValue =
@@ -67,7 +67,7 @@
           , loggedMessageLogSource = Nothing
           , loggedMessageThreadContext =
               Internal.keyMapFromList
-                [ "reqId" .@ ("74ec1d0b" :: String)
+                [ "reqId" .= ("74ec1d0b" :: String)
                 ]
           , loggedMessageText = "No metadata"
           , loggedMessageMeta = Internal.emptyKeyMap
diff --git a/test-suite/TestCase/LogError/MetadataYesThreadContextNo.hs b/test-suite/TestCase/LogError/MetadataYesThreadContextNo.hs
--- a/test-suite/TestCase/LogError/MetadataYesThreadContextNo.hs
+++ b/test-suite/TestCase/LogError/MetadataYesThreadContextNo.hs
@@ -5,7 +5,7 @@
   ( testCase
   ) where
 
-import Control.Monad.Logger.Aeson ((.@), Loc(..), LogLevel(..), LoggedMessage(..), Message(..), logError)
+import Control.Monad.Logger.Aeson ((.=), Loc(..), LogLevel(..), LoggedMessage(..), Message(..), logError)
 import Data.Aeson.QQ.Simple (aesonQQ)
 import Data.Time (UTCTime(..))
 import TestCase (TestCase(..))
@@ -17,8 +17,8 @@
   TestCase
     { actionUnderTest = do
         logError $ "With metadata" :#
-          [ "a" .@ (42 :: Int)
-          , "b" .@ ("x" :: String)
+          [ "a" .= (42 :: Int)
+          , "b" .= ("x" :: String)
           ]
     , logFilePath
     , expectedValue =
@@ -69,8 +69,8 @@
           , loggedMessageText = "With metadata"
           , loggedMessageMeta =
               Internal.keyMapFromList
-                [ "a" .@ (42 :: Int)
-                , "b" .@ ("x" :: String)
+                [ "a" .= (42 :: Int)
+                , "b" .= ("x" :: String)
                 ]
           }
     }
diff --git a/test-suite/TestCase/LogError/MetadataYesThreadContextYes.hs b/test-suite/TestCase/LogError/MetadataYesThreadContextYes.hs
--- a/test-suite/TestCase/LogError/MetadataYesThreadContextYes.hs
+++ b/test-suite/TestCase/LogError/MetadataYesThreadContextYes.hs
@@ -7,7 +7,7 @@
   ) where
 
 import Control.Monad.Logger.Aeson
-  ( (.@), Loc(..), LogLevel(..), LoggedMessage(..), Message(..), logError, withThreadContext
+  ( (.=), Loc(..), LogLevel(..), LoggedMessage(..), Message(..), logError, withThreadContext
   )
 import Data.Aeson.QQ.Simple (aesonQQ)
 import Data.Time (UTCTime(..))
@@ -19,10 +19,10 @@
 testCase logFilePath =
   TestCase
     { actionUnderTest = do
-        withThreadContext ["reqId" .@ ("74ec1d0b" :: String)] do
+        withThreadContext ["reqId" .= ("74ec1d0b" :: String)] do
           logError $ "With metadata" :#
-            [ "a" .@ (42 :: Int)
-            , "b" .@ ("x" :: String)
+            [ "a" .= (42 :: Int)
+            , "b" .= ("x" :: String)
             ]
     , logFilePath
     , expectedValue =
@@ -74,13 +74,13 @@
           , loggedMessageLogSource = Nothing
           , loggedMessageThreadContext =
               Internal.keyMapFromList
-                [ "reqId" .@ ("74ec1d0b" :: String)
+                [ "reqId" .= ("74ec1d0b" :: String)
                 ]
           , loggedMessageText = "With metadata"
           , loggedMessageMeta =
               Internal.keyMapFromList
-                [ "a" .@ (42 :: Int)
-                , "b" .@ ("x" :: String)
+                [ "a" .= (42 :: Int)
+                , "b" .= ("x" :: String)
                 ]
           }
     }
diff --git a/test-suite/TestCase/LogErrorNS/MetadataNoThreadContextYes.hs b/test-suite/TestCase/LogErrorNS/MetadataNoThreadContextYes.hs
--- a/test-suite/TestCase/LogErrorNS/MetadataNoThreadContextYes.hs
+++ b/test-suite/TestCase/LogErrorNS/MetadataNoThreadContextYes.hs
@@ -7,7 +7,7 @@
   ) where
 
 import Control.Monad.Logger.Aeson
-  ( (.@), Loc(..), LogLevel(..), LoggedMessage(..), logErrorNS, withThreadContext
+  ( (.=), Loc(..), LogLevel(..), LoggedMessage(..), logErrorNS, withThreadContext
   )
 import Data.Aeson.QQ.Simple (aesonQQ)
 import Data.Time (UTCTime(..))
@@ -19,7 +19,7 @@
 testCase logFilePath =
   TestCase
     { actionUnderTest = do
-        withThreadContext ["reqId" .@ ("74ec1d0b" :: String)] do
+        withThreadContext ["reqId" .= ("74ec1d0b" :: String)] do
           logErrorNS "tests" "No metadata"
     , logFilePath
     , expectedValue =
@@ -68,7 +68,7 @@
           , loggedMessageLogSource = Just "tests"
           , loggedMessageThreadContext =
               Internal.keyMapFromList
-                [ "reqId" .@ ("74ec1d0b" :: String)
+                [ "reqId" .= ("74ec1d0b" :: String)
                 ]
           , loggedMessageText = "No metadata"
           , loggedMessageMeta = Internal.emptyKeyMap
diff --git a/test-suite/TestCase/LogErrorNS/MetadataYesThreadContextNo.hs b/test-suite/TestCase/LogErrorNS/MetadataYesThreadContextNo.hs
--- a/test-suite/TestCase/LogErrorNS/MetadataYesThreadContextNo.hs
+++ b/test-suite/TestCase/LogErrorNS/MetadataYesThreadContextNo.hs
@@ -5,7 +5,7 @@
   ( testCase
   ) where
 
-import Control.Monad.Logger.Aeson ((.@), Loc(..), LogLevel(..), LoggedMessage(..), Message(..), logErrorNS)
+import Control.Monad.Logger.Aeson ((.=), Loc(..), LogLevel(..), LoggedMessage(..), Message(..), logErrorNS)
 import Data.Aeson.QQ.Simple (aesonQQ)
 import Data.Time (UTCTime(..))
 import TestCase (TestCase(..))
@@ -17,8 +17,8 @@
   TestCase
     { actionUnderTest = do
         logErrorNS "tests" $ "With metadata" :#
-          [ "a" .@ (42 :: Int)
-          , "b" .@ ("x" :: String)
+          [ "a" .= (42 :: Int)
+          , "b" .= ("x" :: String)
           ]
     , logFilePath
     , expectedValue =
@@ -70,8 +70,8 @@
           , loggedMessageText = "With metadata"
           , loggedMessageMeta =
               Internal.keyMapFromList
-                [ "a" .@ (42 :: Int)
-                , "b" .@ ("x" :: String)
+                [ "a" .= (42 :: Int)
+                , "b" .= ("x" :: String)
                 ]
           }
     }
diff --git a/test-suite/TestCase/LogErrorNS/MetadataYesThreadContextYes.hs b/test-suite/TestCase/LogErrorNS/MetadataYesThreadContextYes.hs
--- a/test-suite/TestCase/LogErrorNS/MetadataYesThreadContextYes.hs
+++ b/test-suite/TestCase/LogErrorNS/MetadataYesThreadContextYes.hs
@@ -7,7 +7,7 @@
   ) where
 
 import Control.Monad.Logger.Aeson
-  ( (.@), Loc(..), LogLevel(..), LoggedMessage(..), Message(..), logErrorNS, withThreadContext
+  ( (.=), Loc(..), LogLevel(..), LoggedMessage(..), Message(..), logErrorNS, withThreadContext
   )
 import Data.Aeson.QQ.Simple (aesonQQ)
 import Data.Time (UTCTime(..))
@@ -19,10 +19,10 @@
 testCase logFilePath =
   TestCase
     { actionUnderTest = do
-        withThreadContext ["reqId" .@ ("74ec1d0b" :: String)] do
+        withThreadContext ["reqId" .= ("74ec1d0b" :: String)] do
           logErrorNS "tests" $ "With metadata" :#
-            [ "a" .@ (42 :: Int)
-            , "b" .@ ("x" :: String)
+            [ "a" .= (42 :: Int)
+            , "b" .= ("x" :: String)
             ]
     , logFilePath
     , expectedValue =
@@ -75,13 +75,13 @@
           , loggedMessageLogSource = Just "tests"
           , loggedMessageThreadContext =
               Internal.keyMapFromList
-                [ "reqId" .@ ("74ec1d0b" :: String)
+                [ "reqId" .= ("74ec1d0b" :: String)
                 ]
           , loggedMessageText = "With metadata"
           , loggedMessageMeta =
               Internal.keyMapFromList
-                [ "a" .@ (42 :: Int)
-                , "b" .@ ("x" :: String)
+                [ "a" .= (42 :: Int)
+                , "b" .= ("x" :: String)
                 ]
           }
     }
diff --git a/test-suite/TestCase/LogInfo/MetadataNoThreadContextYes.hs b/test-suite/TestCase/LogInfo/MetadataNoThreadContextYes.hs
--- a/test-suite/TestCase/LogInfo/MetadataNoThreadContextYes.hs
+++ b/test-suite/TestCase/LogInfo/MetadataNoThreadContextYes.hs
@@ -7,7 +7,7 @@
   ) where
 
 import Control.Monad.Logger.Aeson
-  ( (.@), Loc(..), LogLevel(..), LoggedMessage(..), logInfo, withThreadContext
+  ( (.=), Loc(..), LogLevel(..), LoggedMessage(..), logInfo, withThreadContext
   )
 import Data.Aeson.QQ.Simple (aesonQQ)
 import Data.Time (UTCTime(..))
@@ -19,7 +19,7 @@
 testCase logFilePath =
   TestCase
     { actionUnderTest = do
-        withThreadContext ["reqId" .@ ("74ec1d0b" :: String)] do
+        withThreadContext ["reqId" .= ("74ec1d0b" :: String)] do
           logInfo "No metadata"
     , logFilePath
     , expectedValue =
@@ -67,7 +67,7 @@
           , loggedMessageLogSource = Nothing
           , loggedMessageThreadContext =
               Internal.keyMapFromList
-                [ "reqId" .@ ("74ec1d0b" :: String)
+                [ "reqId" .= ("74ec1d0b" :: String)
                 ]
           , loggedMessageText = "No metadata"
           , loggedMessageMeta = Internal.emptyKeyMap
diff --git a/test-suite/TestCase/LogInfo/MetadataYesThreadContextNo.hs b/test-suite/TestCase/LogInfo/MetadataYesThreadContextNo.hs
--- a/test-suite/TestCase/LogInfo/MetadataYesThreadContextNo.hs
+++ b/test-suite/TestCase/LogInfo/MetadataYesThreadContextNo.hs
@@ -5,7 +5,7 @@
   ( testCase
   ) where
 
-import Control.Monad.Logger.Aeson ((.@), Loc(..), LogLevel(..), LoggedMessage(..), Message(..), logInfo)
+import Control.Monad.Logger.Aeson ((.=), Loc(..), LogLevel(..), LoggedMessage(..), Message(..), logInfo)
 import Data.Aeson.QQ.Simple (aesonQQ)
 import Data.Time (UTCTime(..))
 import TestCase (TestCase(..))
@@ -17,8 +17,8 @@
   TestCase
     { actionUnderTest = do
         logInfo $ "With metadata" :#
-          [ "a" .@ (42 :: Int)
-          , "b" .@ ("x" :: String)
+          [ "a" .= (42 :: Int)
+          , "b" .= ("x" :: String)
           ]
     , logFilePath
     , expectedValue =
@@ -69,8 +69,8 @@
           , loggedMessageText = "With metadata"
           , loggedMessageMeta =
               Internal.keyMapFromList
-                [ "a" .@ (42 :: Int)
-                , "b" .@ ("x" :: String)
+                [ "a" .= (42 :: Int)
+                , "b" .= ("x" :: String)
                 ]
           }
     }
diff --git a/test-suite/TestCase/LogInfo/MetadataYesThreadContextYes.hs b/test-suite/TestCase/LogInfo/MetadataYesThreadContextYes.hs
--- a/test-suite/TestCase/LogInfo/MetadataYesThreadContextYes.hs
+++ b/test-suite/TestCase/LogInfo/MetadataYesThreadContextYes.hs
@@ -7,7 +7,7 @@
   ) where
 
 import Control.Monad.Logger.Aeson
-  ( (.@), Loc(..), LogLevel(..), LoggedMessage(..), Message(..), logInfo, withThreadContext
+  ( (.=), Loc(..), LogLevel(..), LoggedMessage(..), Message(..), logInfo, withThreadContext
   )
 import Data.Aeson.QQ.Simple (aesonQQ)
 import Data.Time (UTCTime(..))
@@ -19,10 +19,10 @@
 testCase logFilePath =
   TestCase
     { actionUnderTest = do
-        withThreadContext ["reqId" .@ ("74ec1d0b" :: String)] do
+        withThreadContext ["reqId" .= ("74ec1d0b" :: String)] do
           logInfo $ "With metadata" :#
-            [ "a" .@ (42 :: Int)
-            , "b" .@ ("x" :: String)
+            [ "a" .= (42 :: Int)
+            , "b" .= ("x" :: String)
             ]
     , logFilePath
     , expectedValue =
@@ -74,13 +74,13 @@
           , loggedMessageLogSource = Nothing
           , loggedMessageThreadContext =
               Internal.keyMapFromList
-                [ "reqId" .@ ("74ec1d0b" :: String)
+                [ "reqId" .= ("74ec1d0b" :: String)
                 ]
           , loggedMessageText = "With metadata"
           , loggedMessageMeta =
               Internal.keyMapFromList
-                [ "a" .@ (42 :: Int)
-                , "b" .@ ("x" :: String)
+                [ "a" .= (42 :: Int)
+                , "b" .= ("x" :: String)
                 ]
           }
     }
diff --git a/test-suite/TestCase/LogInfoNS/MetadataNoThreadContextYes.hs b/test-suite/TestCase/LogInfoNS/MetadataNoThreadContextYes.hs
--- a/test-suite/TestCase/LogInfoNS/MetadataNoThreadContextYes.hs
+++ b/test-suite/TestCase/LogInfoNS/MetadataNoThreadContextYes.hs
@@ -7,7 +7,7 @@
   ) where
 
 import Control.Monad.Logger.Aeson
-  ( (.@), Loc(..), LogLevel(..), LoggedMessage(..), logInfoNS, withThreadContext
+  ( (.=), Loc(..), LogLevel(..), LoggedMessage(..), logInfoNS, withThreadContext
   )
 import Data.Aeson.QQ.Simple (aesonQQ)
 import Data.Time (UTCTime(..))
@@ -19,7 +19,7 @@
 testCase logFilePath =
   TestCase
     { actionUnderTest = do
-        withThreadContext ["reqId" .@ ("74ec1d0b" :: String)] do
+        withThreadContext ["reqId" .= ("74ec1d0b" :: String)] do
           logInfoNS "tests" "No metadata"
     , logFilePath
     , expectedValue =
@@ -68,7 +68,7 @@
           , loggedMessageLogSource = Just "tests"
           , loggedMessageThreadContext =
               Internal.keyMapFromList
-                [ "reqId" .@ ("74ec1d0b" :: String)
+                [ "reqId" .= ("74ec1d0b" :: String)
                 ]
           , loggedMessageText = "No metadata"
           , loggedMessageMeta = Internal.emptyKeyMap
diff --git a/test-suite/TestCase/LogInfoNS/MetadataYesThreadContextNo.hs b/test-suite/TestCase/LogInfoNS/MetadataYesThreadContextNo.hs
--- a/test-suite/TestCase/LogInfoNS/MetadataYesThreadContextNo.hs
+++ b/test-suite/TestCase/LogInfoNS/MetadataYesThreadContextNo.hs
@@ -5,7 +5,7 @@
   ( testCase
   ) where
 
-import Control.Monad.Logger.Aeson ((.@), Loc(..), LogLevel(..), LoggedMessage(..), Message(..), logInfoNS)
+import Control.Monad.Logger.Aeson ((.=), Loc(..), LogLevel(..), LoggedMessage(..), Message(..), logInfoNS)
 import Data.Aeson.QQ.Simple (aesonQQ)
 import Data.Time (UTCTime(..))
 import TestCase (TestCase(..))
@@ -17,8 +17,8 @@
   TestCase
     { actionUnderTest = do
         logInfoNS "tests" $ "With metadata" :#
-          [ "a" .@ (42 :: Int)
-          , "b" .@ ("x" :: String)
+          [ "a" .= (42 :: Int)
+          , "b" .= ("x" :: String)
           ]
     , logFilePath
     , expectedValue =
@@ -70,8 +70,8 @@
           , loggedMessageText = "With metadata"
           , loggedMessageMeta =
               Internal.keyMapFromList
-                [ "a" .@ (42 :: Int)
-                , "b" .@ ("x" :: String)
+                [ "a" .= (42 :: Int)
+                , "b" .= ("x" :: String)
                 ]
           }
     }
diff --git a/test-suite/TestCase/LogInfoNS/MetadataYesThreadContextYes.hs b/test-suite/TestCase/LogInfoNS/MetadataYesThreadContextYes.hs
--- a/test-suite/TestCase/LogInfoNS/MetadataYesThreadContextYes.hs
+++ b/test-suite/TestCase/LogInfoNS/MetadataYesThreadContextYes.hs
@@ -7,7 +7,7 @@
   ) where
 
 import Control.Monad.Logger.Aeson
-  ( (.@), Loc(..), LogLevel(..), LoggedMessage(..), Message(..), logInfoNS, withThreadContext
+  ( (.=), Loc(..), LogLevel(..), LoggedMessage(..), Message(..), logInfoNS, withThreadContext
   )
 import Data.Aeson.QQ.Simple (aesonQQ)
 import Data.Time (UTCTime(..))
@@ -19,10 +19,10 @@
 testCase logFilePath =
   TestCase
     { actionUnderTest = do
-        withThreadContext ["reqId" .@ ("74ec1d0b" :: String)] do
+        withThreadContext ["reqId" .= ("74ec1d0b" :: String)] do
           logInfoNS "tests" $ "With metadata" :#
-            [ "a" .@ (42 :: Int)
-            , "b" .@ ("x" :: String)
+            [ "a" .= (42 :: Int)
+            , "b" .= ("x" :: String)
             ]
     , logFilePath
     , expectedValue =
@@ -75,13 +75,13 @@
           , loggedMessageLogSource = Just "tests"
           , loggedMessageThreadContext =
               Internal.keyMapFromList
-                [ "reqId" .@ ("74ec1d0b" :: String)
+                [ "reqId" .= ("74ec1d0b" :: String)
                 ]
           , loggedMessageText = "With metadata"
           , loggedMessageMeta =
               Internal.keyMapFromList
-                [ "a" .@ (42 :: Int)
-                , "b" .@ ("x" :: String)
+                [ "a" .= (42 :: Int)
+                , "b" .= ("x" :: String)
                 ]
           }
     }
diff --git a/test-suite/TestCase/LogOther/MetadataNoThreadContextYes.hs b/test-suite/TestCase/LogOther/MetadataNoThreadContextYes.hs
--- a/test-suite/TestCase/LogOther/MetadataNoThreadContextYes.hs
+++ b/test-suite/TestCase/LogOther/MetadataNoThreadContextYes.hs
@@ -7,7 +7,7 @@
   ) where
 
 import Control.Monad.Logger.Aeson
-  ( (.@), Loc(..), LogLevel(..), LoggedMessage(..), logOther, withThreadContext
+  ( (.=), Loc(..), LogLevel(..), LoggedMessage(..), logOther, withThreadContext
   )
 import Data.Aeson.QQ.Simple (aesonQQ)
 import Data.Time (UTCTime(..))
@@ -19,7 +19,7 @@
 testCase logFilePath =
   TestCase
     { actionUnderTest = do
-        withThreadContext ["reqId" .@ ("74ec1d0b" :: String)] do
+        withThreadContext ["reqId" .= ("74ec1d0b" :: String)] do
           logOther (LevelOther "foo") "No metadata"
     , logFilePath
     , expectedValue =
@@ -67,7 +67,7 @@
           , loggedMessageLogSource = Nothing
           , loggedMessageThreadContext =
               Internal.keyMapFromList
-                [ "reqId" .@ ("74ec1d0b" :: String)
+                [ "reqId" .= ("74ec1d0b" :: String)
                 ]
           , loggedMessageText = "No metadata"
           , loggedMessageMeta = Internal.emptyKeyMap
diff --git a/test-suite/TestCase/LogOther/MetadataYesThreadContextNo.hs b/test-suite/TestCase/LogOther/MetadataYesThreadContextNo.hs
--- a/test-suite/TestCase/LogOther/MetadataYesThreadContextNo.hs
+++ b/test-suite/TestCase/LogOther/MetadataYesThreadContextNo.hs
@@ -5,7 +5,7 @@
   ( testCase
   ) where
 
-import Control.Monad.Logger.Aeson ((.@), Loc(..), LogLevel(..), LoggedMessage(..), Message(..), logOther)
+import Control.Monad.Logger.Aeson ((.=), Loc(..), LogLevel(..), LoggedMessage(..), Message(..), logOther)
 import Data.Aeson.QQ.Simple (aesonQQ)
 import Data.Time (UTCTime(..))
 import TestCase (TestCase(..))
@@ -17,8 +17,8 @@
   TestCase
     { actionUnderTest = do
         logOther (LevelOther "foo") $ "With metadata" :#
-          [ "a" .@ (42 :: Int)
-          , "b" .@ ("x" :: String)
+          [ "a" .= (42 :: Int)
+          , "b" .= ("x" :: String)
           ]
     , logFilePath
     , expectedValue =
@@ -69,8 +69,8 @@
           , loggedMessageText = "With metadata"
           , loggedMessageMeta =
               Internal.keyMapFromList
-                [ "a" .@ (42 :: Int)
-                , "b" .@ ("x" :: String)
+                [ "a" .= (42 :: Int)
+                , "b" .= ("x" :: String)
                 ]
           }
     }
diff --git a/test-suite/TestCase/LogOther/MetadataYesThreadContextYes.hs b/test-suite/TestCase/LogOther/MetadataYesThreadContextYes.hs
--- a/test-suite/TestCase/LogOther/MetadataYesThreadContextYes.hs
+++ b/test-suite/TestCase/LogOther/MetadataYesThreadContextYes.hs
@@ -7,7 +7,7 @@
   ) where
 
 import Control.Monad.Logger.Aeson
-  ( (.@), Loc(..), LogLevel(..), LoggedMessage(..), Message(..), logOther, withThreadContext
+  ( (.=), Loc(..), LogLevel(..), LoggedMessage(..), Message(..), logOther, withThreadContext
   )
 import Data.Aeson.QQ.Simple (aesonQQ)
 import Data.Time (UTCTime(..))
@@ -19,10 +19,10 @@
 testCase logFilePath =
   TestCase
     { actionUnderTest = do
-        withThreadContext ["reqId" .@ ("74ec1d0b" :: String)] do
+        withThreadContext ["reqId" .= ("74ec1d0b" :: String)] do
           logOther (LevelOther "foo") $ "With metadata" :#
-            [ "a" .@ (42 :: Int)
-            , "b" .@ ("x" :: String)
+            [ "a" .= (42 :: Int)
+            , "b" .= ("x" :: String)
             ]
     , logFilePath
     , expectedValue =
@@ -74,13 +74,13 @@
           , loggedMessageLogSource = Nothing
           , loggedMessageThreadContext =
               Internal.keyMapFromList
-                [ "reqId" .@ ("74ec1d0b" :: String)
+                [ "reqId" .= ("74ec1d0b" :: String)
                 ]
           , loggedMessageText = "With metadata"
           , loggedMessageMeta =
               Internal.keyMapFromList
-                [ "a" .@ (42 :: Int)
-                , "b" .@ ("x" :: String)
+                [ "a" .= (42 :: Int)
+                , "b" .= ("x" :: String)
                 ]
           }
     }
diff --git a/test-suite/TestCase/LogOtherNS/MetadataNoThreadContextYes.hs b/test-suite/TestCase/LogOtherNS/MetadataNoThreadContextYes.hs
--- a/test-suite/TestCase/LogOtherNS/MetadataNoThreadContextYes.hs
+++ b/test-suite/TestCase/LogOtherNS/MetadataNoThreadContextYes.hs
@@ -7,7 +7,7 @@
   ) where
 
 import Control.Monad.Logger.Aeson
-  ( (.@), Loc(..), LogLevel(..), LoggedMessage(..), logOtherNS, withThreadContext
+  ( (.=), Loc(..), LogLevel(..), LoggedMessage(..), logOtherNS, withThreadContext
   )
 import Data.Aeson.QQ.Simple (aesonQQ)
 import Data.Time (UTCTime(..))
@@ -19,7 +19,7 @@
 testCase logFilePath =
   TestCase
     { actionUnderTest = do
-        withThreadContext ["reqId" .@ ("74ec1d0b" :: String)] do
+        withThreadContext ["reqId" .= ("74ec1d0b" :: String)] do
           logOtherNS "tests" (LevelOther "foo") "No metadata"
     , logFilePath
     , expectedValue =
@@ -68,7 +68,7 @@
           , loggedMessageLogSource = Just "tests"
           , loggedMessageThreadContext =
               Internal.keyMapFromList
-                [ "reqId" .@ ("74ec1d0b" :: String)
+                [ "reqId" .= ("74ec1d0b" :: String)
                 ]
           , loggedMessageText = "No metadata"
           , loggedMessageMeta = Internal.emptyKeyMap
diff --git a/test-suite/TestCase/LogOtherNS/MetadataYesThreadContextNo.hs b/test-suite/TestCase/LogOtherNS/MetadataYesThreadContextNo.hs
--- a/test-suite/TestCase/LogOtherNS/MetadataYesThreadContextNo.hs
+++ b/test-suite/TestCase/LogOtherNS/MetadataYesThreadContextNo.hs
@@ -5,7 +5,7 @@
   ( testCase
   ) where
 
-import Control.Monad.Logger.Aeson ((.@), Loc(..), LogLevel(..), LoggedMessage(..), Message(..), logOtherNS)
+import Control.Monad.Logger.Aeson ((.=), Loc(..), LogLevel(..), LoggedMessage(..), Message(..), logOtherNS)
 import Data.Aeson.QQ.Simple (aesonQQ)
 import Data.Time (UTCTime(..))
 import TestCase (TestCase(..))
@@ -17,8 +17,8 @@
   TestCase
     { actionUnderTest = do
         logOtherNS "tests" (LevelOther "foo") $ "With metadata" :#
-          [ "a" .@ (42 :: Int)
-          , "b" .@ ("x" :: String)
+          [ "a" .= (42 :: Int)
+          , "b" .= ("x" :: String)
           ]
     , logFilePath
     , expectedValue =
@@ -70,8 +70,8 @@
           , loggedMessageText = "With metadata"
           , loggedMessageMeta =
               Internal.keyMapFromList
-                [ "a" .@ (42 :: Int)
-                , "b" .@ ("x" :: String)
+                [ "a" .= (42 :: Int)
+                , "b" .= ("x" :: String)
                 ]
           }
     }
diff --git a/test-suite/TestCase/LogOtherNS/MetadataYesThreadContextYes.hs b/test-suite/TestCase/LogOtherNS/MetadataYesThreadContextYes.hs
--- a/test-suite/TestCase/LogOtherNS/MetadataYesThreadContextYes.hs
+++ b/test-suite/TestCase/LogOtherNS/MetadataYesThreadContextYes.hs
@@ -7,7 +7,7 @@
   ) where
 
 import Control.Monad.Logger.Aeson
-  ( (.@), Loc(..), LogLevel(..), LoggedMessage(..), Message(..), logOtherNS, withThreadContext
+  ( (.=), Loc(..), LogLevel(..), LoggedMessage(..), Message(..), logOtherNS, withThreadContext
   )
 import Data.Aeson.QQ.Simple (aesonQQ)
 import Data.Time (UTCTime(..))
@@ -19,10 +19,10 @@
 testCase logFilePath =
   TestCase
     { actionUnderTest = do
-        withThreadContext ["reqId" .@ ("74ec1d0b" :: String)] do
+        withThreadContext ["reqId" .= ("74ec1d0b" :: String)] do
           logOtherNS "tests" (LevelOther "foo") $ "With metadata" :#
-            [ "a" .@ (42 :: Int)
-            , "b" .@ ("x" :: String)
+            [ "a" .= (42 :: Int)
+            , "b" .= ("x" :: String)
             ]
     , logFilePath
     , expectedValue =
@@ -75,13 +75,13 @@
           , loggedMessageLogSource = Just "tests"
           , loggedMessageThreadContext =
               Internal.keyMapFromList
-                [ "reqId" .@ ("74ec1d0b" :: String)
+                [ "reqId" .= ("74ec1d0b" :: String)
                 ]
           , loggedMessageText = "With metadata"
           , loggedMessageMeta =
               Internal.keyMapFromList
-                [ "a" .@ (42 :: Int)
-                , "b" .@ ("x" :: String)
+                [ "a" .= (42 :: Int)
+                , "b" .= ("x" :: String)
                 ]
           }
     }
diff --git a/test-suite/TestCase/LogWarn/MetadataNoThreadContextYes.hs b/test-suite/TestCase/LogWarn/MetadataNoThreadContextYes.hs
--- a/test-suite/TestCase/LogWarn/MetadataNoThreadContextYes.hs
+++ b/test-suite/TestCase/LogWarn/MetadataNoThreadContextYes.hs
@@ -7,7 +7,7 @@
   ) where
 
 import Control.Monad.Logger.Aeson
-  ( (.@), Loc(..), LogLevel(..), LoggedMessage(..), logWarn, withThreadContext
+  ( (.=), Loc(..), LogLevel(..), LoggedMessage(..), logWarn, withThreadContext
   )
 import Data.Aeson.QQ.Simple (aesonQQ)
 import Data.Time (UTCTime(..))
@@ -19,7 +19,7 @@
 testCase logFilePath =
   TestCase
     { actionUnderTest = do
-        withThreadContext ["reqId" .@ ("74ec1d0b" :: String)] do
+        withThreadContext ["reqId" .= ("74ec1d0b" :: String)] do
           logWarn $ "No metadata"
     , logFilePath
     , expectedValue =
@@ -67,7 +67,7 @@
           , loggedMessageLogSource = Nothing
           , loggedMessageThreadContext =
               Internal.keyMapFromList
-                [ "reqId" .@ ("74ec1d0b" :: String)
+                [ "reqId" .= ("74ec1d0b" :: String)
                 ]
           , loggedMessageText = "No metadata"
           , loggedMessageMeta = Internal.emptyKeyMap
diff --git a/test-suite/TestCase/LogWarn/MetadataYesThreadContextNo.hs b/test-suite/TestCase/LogWarn/MetadataYesThreadContextNo.hs
--- a/test-suite/TestCase/LogWarn/MetadataYesThreadContextNo.hs
+++ b/test-suite/TestCase/LogWarn/MetadataYesThreadContextNo.hs
@@ -5,7 +5,7 @@
   ( testCase
   ) where
 
-import Control.Monad.Logger.Aeson ((.@), Loc(..), LogLevel(..), LoggedMessage(..), Message(..), logWarn)
+import Control.Monad.Logger.Aeson ((.=), Loc(..), LogLevel(..), LoggedMessage(..), Message(..), logWarn)
 import Data.Aeson.QQ.Simple (aesonQQ)
 import Data.Time (UTCTime(..))
 import TestCase (TestCase(..))
@@ -17,8 +17,8 @@
   TestCase
     { actionUnderTest = do
         logWarn $ "With metadata" :#
-          [ "a" .@ (42 :: Int)
-          , "b" .@ ("x" :: String)
+          [ "a" .= (42 :: Int)
+          , "b" .= ("x" :: String)
           ]
     , logFilePath
     , expectedValue =
@@ -69,8 +69,8 @@
           , loggedMessageText = "With metadata"
           , loggedMessageMeta =
               Internal.keyMapFromList
-                [ "a" .@ (42 :: Int)
-                , "b" .@ ("x" :: String)
+                [ "a" .= (42 :: Int)
+                , "b" .= ("x" :: String)
                 ]
           }
     }
diff --git a/test-suite/TestCase/LogWarn/MetadataYesThreadContextYes.hs b/test-suite/TestCase/LogWarn/MetadataYesThreadContextYes.hs
--- a/test-suite/TestCase/LogWarn/MetadataYesThreadContextYes.hs
+++ b/test-suite/TestCase/LogWarn/MetadataYesThreadContextYes.hs
@@ -7,7 +7,7 @@
   ) where
 
 import Control.Monad.Logger.Aeson
-  ( (.@), Loc(..), LogLevel(..), LoggedMessage(..), Message(..), logWarn, withThreadContext
+  ( (.=), Loc(..), LogLevel(..), LoggedMessage(..), Message(..), logWarn, withThreadContext
   )
 import Data.Aeson.QQ.Simple (aesonQQ)
 import Data.Time (UTCTime(..))
@@ -19,10 +19,10 @@
 testCase logFilePath =
   TestCase
     { actionUnderTest = do
-        withThreadContext ["reqId" .@ ("74ec1d0b" :: String)] do
+        withThreadContext ["reqId" .= ("74ec1d0b" :: String)] do
           logWarn $ "With metadata" :#
-            [ "a" .@ (42 :: Int)
-            , "b" .@ ("x" :: String)
+            [ "a" .= (42 :: Int)
+            , "b" .= ("x" :: String)
             ]
     , logFilePath
     , expectedValue =
@@ -74,13 +74,13 @@
           , loggedMessageLogSource = Nothing
           , loggedMessageThreadContext =
               Internal.keyMapFromList
-                [ "reqId" .@ ("74ec1d0b" :: String)
+                [ "reqId" .= ("74ec1d0b" :: String)
                 ]
           , loggedMessageText = "With metadata"
           , loggedMessageMeta =
               Internal.keyMapFromList
-                [ "a" .@ (42 :: Int)
-                , "b" .@ ("x" :: String)
+                [ "a" .= (42 :: Int)
+                , "b" .= ("x" :: String)
                 ]
           }
     }
diff --git a/test-suite/TestCase/LogWarnNS/MetadataNoThreadContextYes.hs b/test-suite/TestCase/LogWarnNS/MetadataNoThreadContextYes.hs
--- a/test-suite/TestCase/LogWarnNS/MetadataNoThreadContextYes.hs
+++ b/test-suite/TestCase/LogWarnNS/MetadataNoThreadContextYes.hs
@@ -7,7 +7,7 @@
   ) where
 
 import Control.Monad.Logger.Aeson
-  ( Loc(..), LogLevel(..), LoggedMessage(..), (.@), logWarnNS, withThreadContext
+  ( Loc(..), LogLevel(..), LoggedMessage(..), (.=), logWarnNS, withThreadContext
   )
 import Data.Aeson.QQ.Simple (aesonQQ)
 import Data.Time (UTCTime(..))
@@ -19,7 +19,7 @@
 testCase logFilePath =
   TestCase
     { actionUnderTest = do
-        withThreadContext ["reqId" .@ ("74ec1d0b" :: String)] do
+        withThreadContext ["reqId" .= ("74ec1d0b" :: String)] do
           logWarnNS "tests" "No metadata"
     , logFilePath
     , expectedValue =
@@ -68,7 +68,7 @@
           , loggedMessageLogSource = Just "tests"
           , loggedMessageThreadContext =
               Internal.keyMapFromList
-                [ "reqId" .@ ("74ec1d0b" :: String)
+                [ "reqId" .= ("74ec1d0b" :: String)
                 ]
           , loggedMessageText = "No metadata"
           , loggedMessageMeta = Internal.emptyKeyMap
diff --git a/test-suite/TestCase/LogWarnNS/MetadataYesThreadContextNo.hs b/test-suite/TestCase/LogWarnNS/MetadataYesThreadContextNo.hs
--- a/test-suite/TestCase/LogWarnNS/MetadataYesThreadContextNo.hs
+++ b/test-suite/TestCase/LogWarnNS/MetadataYesThreadContextNo.hs
@@ -5,7 +5,7 @@
   ( testCase
   ) where
 
-import Control.Monad.Logger.Aeson ((.@), Loc(..), LogLevel(..), LoggedMessage(..), Message(..), logWarnNS)
+import Control.Monad.Logger.Aeson ((.=), Loc(..), LogLevel(..), LoggedMessage(..), Message(..), logWarnNS)
 import Data.Aeson.QQ.Simple (aesonQQ)
 import Data.Time (UTCTime(..))
 import TestCase (TestCase(..))
@@ -17,8 +17,8 @@
   TestCase
     { actionUnderTest = do
         logWarnNS "tests" $ "With metadata" :#
-          [ "a" .@ (42 :: Int)
-          , "b" .@ ("x" :: String)
+          [ "a" .= (42 :: Int)
+          , "b" .= ("x" :: String)
           ]
     , logFilePath
     , expectedValue =
@@ -70,8 +70,8 @@
           , loggedMessageText = "With metadata"
           , loggedMessageMeta =
               Internal.keyMapFromList
-                [ "a" .@ (42 :: Int)
-                , "b" .@ ("x" :: String)
+                [ "a" .= (42 :: Int)
+                , "b" .= ("x" :: String)
                 ]
           }
     }
diff --git a/test-suite/TestCase/LogWarnNS/MetadataYesThreadContextYes.hs b/test-suite/TestCase/LogWarnNS/MetadataYesThreadContextYes.hs
--- a/test-suite/TestCase/LogWarnNS/MetadataYesThreadContextYes.hs
+++ b/test-suite/TestCase/LogWarnNS/MetadataYesThreadContextYes.hs
@@ -7,7 +7,7 @@
   ) where
 
 import Control.Monad.Logger.Aeson
-  ( (.@), Loc(..), LogLevel(..), LoggedMessage(..), Message(..), logWarnNS, withThreadContext
+  ( (.=), Loc(..), LogLevel(..), LoggedMessage(..), Message(..), logWarnNS, withThreadContext
   )
 import Data.Aeson.QQ.Simple (aesonQQ)
 import Data.Time (UTCTime(..))
@@ -19,10 +19,10 @@
 testCase logFilePath =
   TestCase
     { actionUnderTest = do
-        withThreadContext ["reqId" .@ ("74ec1d0b" :: String)] do
+        withThreadContext ["reqId" .= ("74ec1d0b" :: String)] do
           logWarnNS "tests" $ "With metadata" :#
-            [ "a" .@ (42 :: Int)
-            , "b" .@ ("x" :: String)
+            [ "a" .= (42 :: Int)
+            , "b" .= ("x" :: String)
             ]
     , logFilePath
     , expectedValue =
@@ -75,13 +75,13 @@
           , loggedMessageLogSource = Just "tests"
           , loggedMessageThreadContext =
               Internal.keyMapFromList
-                [ "reqId" .@ ("74ec1d0b" :: String)
+                [ "reqId" .= ("74ec1d0b" :: String)
                 ]
           , loggedMessageText = "With metadata"
           , loggedMessageMeta =
               Internal.keyMapFromList
-                [ "a" .@ (42 :: Int)
-                , "b" .@ ("x" :: String)
+                [ "a" .= (42 :: Int)
+                , "b" .= ("x" :: String)
                 ]
           }
     }
diff --git a/test-suite/TestCase/MonadLogger/LogDebug/ThreadContextYes.hs b/test-suite/TestCase/MonadLogger/LogDebug/ThreadContextYes.hs
--- a/test-suite/TestCase/MonadLogger/LogDebug/ThreadContextYes.hs
+++ b/test-suite/TestCase/MonadLogger/LogDebug/ThreadContextYes.hs
@@ -6,7 +6,7 @@
   ( testCase
   ) where
 
-import Control.Monad.Logger.Aeson ((.@), Loc(..), LogLevel(..), LoggedMessage(..), withThreadContext)
+import Control.Monad.Logger.Aeson ((.=), Loc(..), LogLevel(..), LoggedMessage(..), withThreadContext)
 import Data.Aeson.QQ.Simple (aesonQQ)
 import Data.Time (UTCTime(..))
 import TestCase (TestCase(..))
@@ -18,7 +18,7 @@
 testCase logFilePath =
   TestCase
     { actionUnderTest = do
-        withThreadContext ["reqId" .@ ("74ec1d0b" :: String)] do
+        withThreadContext ["reqId" .= ("74ec1d0b" :: String)] do
           ML.logDebug "Logged from 'monad-logger'"
     , logFilePath
     , expectedValue =
@@ -66,7 +66,7 @@
           , loggedMessageLogSource = Nothing
           , loggedMessageThreadContext =
               Internal.keyMapFromList
-                [ "reqId" .@ ("74ec1d0b" :: String)
+                [ "reqId" .= ("74ec1d0b" :: String)
                 ]
           , loggedMessageText = "Logged from 'monad-logger'"
           , loggedMessageMeta = Internal.emptyKeyMap
diff --git a/test-suite/TestCase/MonadLogger/LogDebugN/ThreadContextYes.hs b/test-suite/TestCase/MonadLogger/LogDebugN/ThreadContextYes.hs
--- a/test-suite/TestCase/MonadLogger/LogDebugN/ThreadContextYes.hs
+++ b/test-suite/TestCase/MonadLogger/LogDebugN/ThreadContextYes.hs
@@ -6,7 +6,7 @@
   ( testCase
   ) where
 
-import Control.Monad.Logger.Aeson ((.@), LogLevel(..), LoggedMessage(..), withThreadContext)
+import Control.Monad.Logger.Aeson ((.=), LogLevel(..), LoggedMessage(..), withThreadContext)
 import Data.Aeson.QQ.Simple (aesonQQ)
 import Data.Time (UTCTime(..))
 import TestCase (TestCase(..))
@@ -18,7 +18,7 @@
 testCase logFilePath =
   TestCase
     { actionUnderTest = do
-        withThreadContext ["reqId" .@ ("74ec1d0b" :: String)] do
+        withThreadContext ["reqId" .= ("74ec1d0b" :: String)] do
           ML.logDebugN "Logged from 'monad-logger'"
     , logFilePath
     , expectedValue =
@@ -52,7 +52,7 @@
           , loggedMessageLogSource = Nothing
           , loggedMessageThreadContext =
               Internal.keyMapFromList
-                [ "reqId" .@ ("74ec1d0b" :: String)
+                [ "reqId" .= ("74ec1d0b" :: String)
                 ]
           , loggedMessageText = "Logged from 'monad-logger'"
           , loggedMessageMeta = Internal.emptyKeyMap
