diff --git a/CHANGELOG.md b/CHANGELOG.md
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -24,7 +24,13 @@
 
 ## [Unreleased]
 
+## [0.1.2.2] - 2023-06-29
 
+### Fixed
+
+- Increased upper bound for `aeson`
+
+
 ## [0.1.2.1] - 2022-11-12
 
 ### Added 
@@ -58,7 +64,9 @@
 
 - Initial release
 
-[unreleased]: https://github.com/Disco-Dave/katip-wai/compare/releases/0.1.2.1...HEAD
+
+[unreleased]: https://github.com/Disco-Dave/katip-wai/compare/releases/0.1.2.2...HEAD
+[0.1.2.2]: https://github.com/Disco-Dave/katip-wai/compare/releases/0.1.2.1...releases/0.1.2.2
 [0.1.2.1]: https://github.com/Disco-Dave/katip-wai/compare/releases/0.1.2.0...releases/0.1.2.1
 [0.1.2.0]: https://github.com/Disco-Dave/katip-wai/compare/releases/0.1.1.0...releases/0.1.2.0
 [0.1.1.0]: https://github.com/Disco-Dave/katip-wai/compare/releases/0.1.0.0...releases/0.1.1.0
diff --git a/katip-wai.cabal b/katip-wai.cabal
--- a/katip-wai.cabal
+++ b/katip-wai.cabal
@@ -1,7 +1,7 @@
 cabal-version: 2.2
 
 name: katip-wai
-version: 0.1.2.1
+version: 0.1.2.2
 
 synopsis: WAI middleware for logging request and response info through katip.
 description: WAI middleware for logging request and response info through katip. Please see the README on GitHub at <https://github.com/Disco-Dave/katip-wai#readme>
@@ -59,7 +59,7 @@
       -Werror
 
   build-depends:
-    , aeson >=0.6 && <2.2
+    , aeson >=0.6 && <2.3
     , base >=4.7 && <5
     , bytestring >=0.9 && <0.12
     , http-types >=0.12 && <0.13
diff --git a/src/Katip/Wai.hs b/src/Katip/Wai.hs
--- a/src/Katip/Wai.hs
+++ b/src/Katip/Wai.hs
@@ -1,18 +1,19 @@
+{-# LANGUAGE CPP #-}
 {-# LANGUAGE OverloadedStrings #-}
 {-# LANGUAGE RankNTypes #-}
 {-# LANGUAGE RecordWildCards #-}
 {-# LANGUAGE StrictData #-}
 
 -- |
---Description: Middleware for logging request and response info through Katip.
+-- Description: Middleware for logging request and response info through Katip.
 --
---Add information about 'Wai.Request', 'Wai.response', and the elapsed time to Katip's 'Katip.LogContexts'.
+-- Add information about 'Wai.Request', 'Wai.Response', and the elapsed time to Katip's 'Katip.LogContexts'.
 --
---The following is added to the context as \"response\":
+-- The following is added to the context as \"response\":
 --
---  - \"elapsedTimeInNanoSeconds\": Amount of time from receiving the request to sending the response in nano seconds.
+--   - \"elapsedTimeInNanoSeconds\": Amount of time from receiving the request to sending the response in nano seconds.
 --
---  - \"status\": The status of the response, ie. 200, 202, 204, 400, 404, 500, etc.
+--   - \"status\": The status of the response, ie. 200, 202, 204, 400, 404, 500, etc.
 module Katip.Wai
   ( -- * Middleware
     defaultFormat
@@ -62,8 +63,13 @@
   , requestHeaderRange :: Maybe ByteString
   }
 
-
+#if MIN_VERSION_aeson(2,2,0)
+requestToKeyValues :: Aeson.KeyValue e kv => Request -> [kv]
+#else
 requestToKeyValues :: Aeson.KeyValue kv => Request -> [kv]
+#endif
+
+
 requestToKeyValues Request{..} =
   let toText = decodeUtf8With lenientDecode
       headers =
@@ -142,8 +148,13 @@
   , responseStatus :: Status
   }
 
-
+#if MIN_VERSION_aeson(2,2,0)
+responseToKeyValues :: Aeson.KeyValue e kv => Response -> [kv]
+#else
 responseToKeyValues :: Aeson.KeyValue kv => Response -> [kv]
+#endif
+
+
 responseToKeyValues Response{..} =
   [ "elapsedTimeInNanoSeconds" .= Clock.toNanoSecs responseElapsedTime
   , "status" .= fromEnum responseStatus