diff --git a/CHANGELOG.md b/CHANGELOG.md
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,10 @@
 # configuration-tools
 
+## 0.6.1 (2021-10-12)
+
+* Support GHC-9.2
+* Support aeson >=2.0
+
 ## 0.6.0 (2021-02-16)
 
 #### New
diff --git a/Setup.hs b/Setup.hs
--- a/Setup.hs
+++ b/Setup.hs
@@ -111,9 +111,12 @@
 import Distribution.Simple.PackageIndex
 import Distribution.Simple.Setup
 import Distribution.Text
-import Distribution.Types.LocalBuildInfo
 import Distribution.Types.UnqualComponentName
 
+#if MIN_VERSION_Cabal(3,6,0)
+import Distribution.Utils.Path
+#endif
+
 #if MIN_VERSION_Cabal(3,2,0)
 import Distribution.Utils.ShortText
 #endif
@@ -373,12 +376,19 @@
 
 licenseFilesText :: PackageDescription -> IO B.ByteString
 licenseFilesText pkgDesc =
-    B.intercalate "\n------------------------------------------------------------\n" <$> mapM fileText
+    B.intercalate "\n------------------------------------------------------------\n" <$> mapM fileTextStr
         (licenseFiles pkgDesc)
   where
     fileText file = doesFileExist file >>= \x -> if x
         then B.readFile file
         else return ""
+
+#if MIN_VERSION_Cabal(3,6,0)
+    fileTextStr = fileText . getSymbolicPath
+#else
+    fileTextStr = fileText
+#endif
+
 
 hgInfo :: IO (String, String, String)
 hgInfo = do
diff --git a/configuration-tools.cabal b/configuration-tools.cabal
--- a/configuration-tools.cabal
+++ b/configuration-tools.cabal
@@ -1,7 +1,7 @@
 cabal-version: 2.2
 
 name: configuration-tools
-version: 0.6.0
+version: 0.6.1
 synopsis: Tools for specifying and parsing configurations
 description:
     Tools for specifying and parsing configurations
@@ -38,9 +38,9 @@
 category: Configuration, Console
 build-type: Custom
 tested-with:
-      GHC==8.10.4
+      GHC==9.0.1
+    , GHC==8.10.7
     , GHC==8.8.4
-    , GHC==8.6.5
 
 extra-doc-files:
     README.md,
diff --git a/src/Configuration/Utils/ConfigFile.hs b/src/Configuration/Utils/ConfigFile.hs
--- a/src/Configuration/Utils/ConfigFile.hs
+++ b/src/Configuration/Utils/ConfigFile.hs
@@ -68,7 +68,12 @@
 import Data.Aeson.Types (Parser)
 import Data.Char
 import Data.Foldable
+#if MIN_VERSION_aeson(2,0,0)
+import qualified Data.Aeson.Key as K
+import qualified Data.Aeson.KeyMap as H
+#else
 import qualified Data.HashMap.Strict as H
+#endif
 import Data.Maybe
 import Data.Monoid.Unicode
 import Data.String
@@ -82,6 +87,17 @@
 import Configuration.Utils.Operators
 #endif
 
+-- -------------------------------------------------------------------------- --
+-- Compatibility
+
+#if MIN_VERSION_aeson(2,0,0)
+fromText ∷ T.Text → Key
+fromText = K.fromText
+#else
+fromText ∷ T.Text → T.Text
+fromText = id
+#endif
+
 -- | A JSON 'Value' parser for a property of a given
 -- 'Object' that updates a setter with the parsed value.
 --
@@ -115,7 +131,7 @@
     → (Value → Parser b) -- ^ the JSON 'Value' parser that is used to parse the value of the property
     → Object -- ^ the parsed JSON 'Value' 'Object'
     → Parser (a → a)
-setProperty s k p o = case H.lookup k o of
+setProperty s k p o = case H.lookup (fromText k) o of
     Nothing → pure id
     Just v → set s <$> p v
 
@@ -183,7 +199,7 @@
     → (Value → Parser (b → b))
     → Object
     → Parser (a → a)
-updateProperty s k p o = case H.lookup k o of
+updateProperty s k p o = case H.lookup (fromText k) o of
     Nothing → pure id
     Just v → over s <$> p v
 {-# INLINE updateProperty #-}
@@ -229,7 +245,7 @@
     → T.Text
     → Object
     → Parser (a → a)
-(!..:) l property o = set l <$> (o .: property)
+(!..:) l property o = set l <$> (o .: fromText property)
 {-# INLINE (!..:) #-}
 
 -- -------------------------------------------------------------------------- --
@@ -278,5 +294,5 @@
 dropAndUncaml ∷ Int → String → String
 dropAndUncaml _ "" = ""
 dropAndUncaml i l = case drop i l of
-    [] -> l
-    (h:t) -> toLower h : concatMap (\x → if isUpper x then "-" ⊕ [toLower x] else [x]) t
+    [] → l
+    (h:t) → toLower h : concatMap (\x → if isUpper x then "-" ⊕ [toLower x] else [x]) t
diff --git a/src/Configuration/Utils/Internal/JsonTools.hs b/src/Configuration/Utils/Internal/JsonTools.hs
--- a/src/Configuration/Utils/Internal/JsonTools.hs
+++ b/src/Configuration/Utils/Internal/JsonTools.hs
@@ -1,3 +1,4 @@
+{-# LANGUAGE CPP #-}
 {-# LANGUAGE DeriveAnyClass #-}
 {-# LANGUAGE DeriveGeneric #-}
 {-# LANGUAGE DerivingStrategies #-}
@@ -38,7 +39,11 @@
 import Data.Aeson
 import Data.Aeson.Types
 import Data.Foldable
+#if MIN_VERSION_aeson(2,0,0)
+import qualified Data.Aeson.KeyMap as HM
+#else
 import qualified Data.HashMap.Strict as HM
+#endif
 import qualified Data.Vector as V
 
 import GHC.Generics
diff --git a/src/Configuration/Utils/Setup.hs b/src/Configuration/Utils/Setup.hs
--- a/src/Configuration/Utils/Setup.hs
+++ b/src/Configuration/Utils/Setup.hs
@@ -113,6 +113,10 @@
 import Distribution.Text
 import Distribution.Types.UnqualComponentName
 
+#if MIN_VERSION_Cabal(3,6,0)
+import Distribution.Utils.Path
+#endif
+
 #if MIN_VERSION_Cabal(3,2,0)
 import Distribution.Utils.ShortText
 #endif
@@ -372,12 +376,19 @@
 
 licenseFilesText :: PackageDescription -> IO B.ByteString
 licenseFilesText pkgDesc =
-    B.intercalate "\n------------------------------------------------------------\n" <$> mapM fileText
+    B.intercalate "\n------------------------------------------------------------\n" <$> mapM fileTextStr
         (licenseFiles pkgDesc)
   where
     fileText file = doesFileExist file >>= \x -> if x
         then B.readFile file
         else return ""
+
+#if MIN_VERSION_Cabal(3,6,0)
+    fileTextStr = fileText . getSymbolicPath
+#else
+    fileTextStr = fileText
+#endif
+
 
 hgInfo :: IO (String, String, String)
 hgInfo = do