--- probability.cabal.orig	2014-05-29 07:12:14 UTC
+++ probability.cabal
@@ -37,7 +37,7 @@ Flag splitBase
 Library
   Build-Depends:
     utility-ht >=0.0.6 && <0.1,
-    transformers >=0.0.1 && <0.4
+    transformers >=0.0.1 && <0.5
   If flag(splitBase)
     Build-Depends:
       containers >=0.1 && <0.6,