diff --git a/Changelog.md b/Changelog.md
--- a/Changelog.md
+++ b/Changelog.md
@@ -1,3 +1,11 @@
+# 1.2.1
+
+## Other Changes
+
+* Increased upper bound of `base` to allow < 4.11.
+
+---
+
 # 1.2.0
 
 ## Major 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: 1.2.0
+version: 1.2.1
 synopsis: A mtl-style monad transformer for general purpose & compositional logging
 homepage: https://github.com/ocharles/logging-effect
 license: BSD3
@@ -13,7 +13,7 @@
 library
   exposed-modules:     Control.Monad.Log
   other-extensions:    ViewPatterns, OverloadedStrings, GeneralizedNewtypeDeriving, FlexibleContexts, FlexibleInstances, MultiParamTypeClasses, FunctionalDependencies, PatternSynonyms
-  build-depends:       base >=4.8 && <4.10
+  build-depends:       base >=4.8 && <4.11
                      , async >=2.0 && <2.2
                      , transformers >=0.4 && <0.6
                      , text >=1.2 && <1.3
@@ -36,3 +36,4 @@
   main-is: Benchmark.hs
   build-depends: base, logging-effect, criterion, monad-logger, fast-logger, text, bytestring, wl-pprint-text, lifted-async, time
   ghc-options: -O2
+  default-language:    Haskell2010