diff --git a/hoppy-runtime.cabal b/hoppy-runtime.cabal
--- a/hoppy-runtime.cabal
+++ b/hoppy-runtime.cabal
@@ -1,5 +1,5 @@
 name: hoppy-runtime
-version: 0.2.0
+version: 0.2.1
 synopsis: C++ FFI generator - Runtime support
 homepage: http://khumba.net/projects/hoppy
 license: Apache-2.0
@@ -25,7 +25,7 @@
     , GeneralizedNewtypeDeriving
     , MultiParamTypeClasses
   build-depends:
-      base >=4.7 && <4.9
+      base >=4.7 && <5
   hs-source-dirs: src
   ghc-options: -W -fwarn-incomplete-patterns -fwarn-unused-do-bind
   default-language: Haskell2010