diff --git a/Changelog.md b/Changelog.md
--- a/Changelog.md
+++ b/Changelog.md
@@ -1,3 +1,11 @@
+# 1.2.3
+
+## Other Changes
+
+* Increased upper of `async`.
+
+---
+
 # 1.2.2
 
 ## Other Changes
diff --git a/logging-effect.cabal b/logging-effect.cabal
--- a/logging-effect.cabal
+++ b/logging-effect.cabal
@@ -1,5 +1,5 @@
 name: logging-effect
-version: 1.2.2
+version: 1.2.3
 synopsis: A mtl-style monad transformer for general purpose & compositional logging
 homepage: https://github.com/ocharles/logging-effect
 license: BSD3
@@ -14,7 +14,7 @@
   exposed-modules:     Control.Monad.Log
   other-extensions:    ViewPatterns, OverloadedStrings, GeneralizedNewtypeDeriving, FlexibleContexts, FlexibleInstances, MultiParamTypeClasses, FunctionalDependencies, PatternSynonyms
   build-depends:       base >=4.8 && <4.11
-                     , async >=2.0 && <2.2
+                     , async >=2.0 && <2.3
                      , transformers >=0.4 && <0.6
                      , text >=1.2 && <1.3
                      , time >=1.5 && <1.10