diff --git a/reactive-banana.cabal b/reactive-banana.cabal
--- a/reactive-banana.cabal
+++ b/reactive-banana.cabal
@@ -1,5 +1,5 @@
 Name:                reactive-banana
-Version:             0.5.0.1
+Version:             0.5.0.2
 Synopsis:            Practical library for functional reactive programming (FRP).
 Description:         
     Reactive-banana is a practical library for Functional Reactive Programming (FRP).
@@ -37,7 +37,7 @@
                         DeriveDataTypeable
     build-depends:
         base >= 4.2 && < 5, containers >= 0.3 && < 0.5,
-        transformers == 0.2.*,
+        transformers >= 0.2 && < 0.4,
         QuickCheck >= 1.2 && < 2.5,
         vault == 0.1.*, unordered-containers == 0.2.*, hashable == 1.1.*,
         fclabels == 1.1.*