diff --git a/utf8-string.cabal b/utf8-string.cabal
index b15061bf80401cba09482a54e7bbdd9e28438a94..611f6862582780eb648539ec07a3f1e09573f3ba 100644
--- a/utf8-string.cabal
+++ b/utf8-string.cabal
@@ -24,7 +24,7 @@ source-repository head
 library
   Ghc-options:        -W -O2
 
-  build-depends:      base >= 4.3 && < 4.11, bytestring >= 0.9
+  build-depends:      base >= 4.3 && < 5, bytestring >= 0.9
 
   Exposed-modules:    Codec.Binary.UTF8.String
                       Codec.Binary.UTF8.Generic