diff --git a/CHANGELOG.md b/CHANGELOG.md
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,9 @@
 ## Upcoming
 
+## 1.1.1
+
+* Add support for `aeson-2.0.0.0`
+
 ## 1.1.0
 
 * Rename `GitHubState` to `GitHubSettings`
diff --git a/github-rest.cabal b/github-rest.cabal
--- a/github-rest.cabal
+++ b/github-rest.cabal
@@ -4,10 +4,10 @@
 --
 -- see: https://github.com/sol/hpack
 --
--- hash: 800fa4f169210c967d917bacbc61e12d696ad192e8744af6798c68552fd8c05c
+-- hash: cd7875e6f445fb80991854ab94196826c6e579e0149c6b3a3d63fb928f3a10f5
 
 name:           github-rest
-version:        1.1.0
+version:        1.1.1
 synopsis:       Query the GitHub REST API programmatically
 description:    Query the GitHub REST API programmatically, which can provide a more
                 flexible and clear interface than if all of the endpoints and their types
@@ -46,7 +46,7 @@
       src
   ghc-options: -Wall
   build-depends:
-      aeson >=1.1.2.0 && <1.6
+      aeson >=1.1.2.0 && <2.1
     , base >=4.9 && <5
     , bytestring >=0.10.8.1 && <0.11
     , http-client >=0.5.13.1 && <0.8
@@ -80,7 +80,7 @@
       test
   ghc-options: -Wall
   build-depends:
-      aeson >=1.1.2.0 && <1.6
+      aeson >=1.1.2.0 && <2.1
     , aeson-qq
     , base >=4.9 && <5
     , bytestring >=0.10.8.1 && <0.11
diff --git a/src/GitHub/REST.hs b/src/GitHub/REST.hs
--- a/src/GitHub/REST.hs
+++ b/src/GitHub/REST.hs
@@ -1,3 +1,5 @@
+{-# LANGUAGE CPP #-}
+
 {- |
 Module      :  GitHub.REST
 Maintainer  :  Brandon Chinn <brandon@leapyear.io>
@@ -46,6 +48,10 @@
 import Network.HTTP.Types (Status, StdMethod (..), status422)
 import UnliftIO.Exception (handleJust)
 
+#if MIN_VERSION_aeson(2,0,0)
+import Data.Aeson.Key (fromText)
+#endif
+
 import GitHub.REST.Auth
 import GitHub.REST.Endpoint
 import GitHub.REST.KeyValue
@@ -77,4 +83,9 @@
 (.:) :: FromJSON a => Value -> Text -> a
 (.:) v key = either error id $ parseEither parseObject v
   where
-    parseObject = withObject "parseObject" (`parseField` key)
+    parseObject = withObject "parseObject" (`parseField` fromText key)
+
+#if !MIN_VERSION_aeson(2,0,0)
+fromText :: Text -> Text
+fromText = id
+#endif
diff --git a/src/GitHub/REST/KeyValue.hs b/src/GitHub/REST/KeyValue.hs
--- a/src/GitHub/REST/KeyValue.hs
+++ b/src/GitHub/REST/KeyValue.hs
@@ -1,3 +1,4 @@
+{-# LANGUAGE CPP #-}
 {-# LANGUAGE FlexibleInstances #-}
 {-# LANGUAGE GADTs #-}
 
@@ -21,6 +22,10 @@
 import Data.Text (Text)
 import qualified Data.Text as Text
 
+#if MIN_VERSION_aeson(2,0,0)
+import Data.Aeson.Key (fromText)
+#endif
+
 -- | A type representing a key-value pair.
 data KeyValue where
   (:=) :: (Show v, ToJSON v) => Text -> v -> KeyValue
@@ -35,7 +40,7 @@
 
 -- | Convert a 'KeyValue' into a 'Pair'.
 toPair :: KeyValue -> Pair
-toPair (k := v) = (k, toJSON v)
+toPair (k := v) = (fromText k, toJSON v)
 
 -- | Convert the given KeyValues into a JSON Object.
 kvToValue :: [KeyValue] -> Value
@@ -51,3 +56,10 @@
       Bool b -> Text.pack . show $ b
       _ -> error $ "Could not convert value: " ++ show v
     prettyNum x = either show show (floatingOrInteger x :: Either Double Integer)
+
+{- Helpers -}
+
+#if !MIN_VERSION_aeson(2,0,0)
+fromText :: Text -> Text
+fromText = id
+#endif