Index: b/distributive.cabal
===================================================================
--- a/distributive.cabal
+++ b/distributive.cabal
@@ -1,6 +1,7 @@
 name:          distributive
 category:      Data Structures
 version:       0.6.2.1
+x-revision: 1
 license:       BSD3
 cabal-version: >= 1.10
 license-file:  LICENSE
@@ -56,7 +57,7 @@ library
   build-depends:
     base                >= 4   && < 5,
     base-orphans        >= 0.5.2 && < 1,
-    transformers        >= 0.3 && < 0.6
+    transformers        >= 0.3 && < 0.7
 
   hs-source-dirs:  src
   exposed-modules:
