diff --git a/dynamic-state.cabal b/dynamic-state.cabal
--- a/dynamic-state.cabal
+++ b/dynamic-state.cabal
@@ -1,5 +1,5 @@
 name:                dynamic-state
-version:             0.2.0.0
+version:             0.2.1.0
 synopsis:            Optionally serializable dynamic state keyed by type
 description:         Optionally serializable dynamic state keyed by type
 license:             GPL-2
@@ -19,7 +19,7 @@
     Data.DynamicState.Serializable
 
   build-depends:
-      base >=4.5 && <5
+      base >=4.6 && <4.9
     , binary
     , bytestring
     , unordered-containers