diff --git a/async.cabal b/async.cabal
index edbb9a6..d167adc 100644
--- a/async.cabal
+++ b/async.cabal
@@ -71,7 +71,7 @@ library
     exposed-modules:     Control.Concurrent.Async
                          Control.Concurrent.Async.Internal
     build-depends:       base     >= 4.3     && < 4.21,
-                         hashable >= 1.1.2.0 && < 1.5,
+                         hashable >= 1.1.2.0 && < 1.6,
                          stm      >= 2.2     && < 2.6
 
 test-suite test-async