diff --git a/managed.cabal b/managed.cabal
--- a/managed.cabal
+++ b/managed.cabal
@@ -1,5 +1,5 @@
 Name: managed
-Version: 1.0.3
+Version: 1.0.4
 Cabal-Version: >=1.8.0.2
 Build-Type: Simple
 License: BSD3
@@ -33,7 +33,7 @@
     Hs-Source-Dirs: src
     Build-Depends:
         base              >= 4.5     && < 5  ,
-        transformers      >= 0.2.0.0 && < 0.6
+        transformers      >= 0.4.0.0 && < 0.6
     Exposed-Modules:
         Control.Monad.Managed,
         Control.Monad.Managed.Safe