diff --git a/quickterm.cabal b/quickterm.cabal
--- a/quickterm.cabal
+++ b/quickterm.cabal
@@ -1,5 +1,5 @@
 name: quickterm
-version: 0.2.0.0
+version: 0.2.1.0
 cabal-version: >=1.10
 build-type: Simple
 license: GPL-3
@@ -43,7 +43,7 @@
 executable qt-demo
     main-is: Main.hs
     build-depends:
-        base >=4.8 && <4.9,
+        base >=4.8 && <5,
         quickterm -any
     default-language: Haskell2010
     hs-source-dirs: src/demo