diff --git a/blas-comfort-array.cabal b/blas-comfort-array.cabal
--- a/blas-comfort-array.cabal
+++ b/blas-comfort-array.cabal
@@ -1,5 +1,5 @@
 Name:             blas-comfort-array
-Version:          0.0.0.3
+Version:          0.0.0.4
 License:          BSD3
 License-File:     LICENSE
 Author:           Henning Thielemann <haskell@henning-thielemann.de>
@@ -20,7 +20,7 @@
 Build-Type:       Simple
 
 Source-Repository this
-  Tag:         0.0.0.3
+  Tag:         0.0.0.4
   Type:        darcs
   Location:    https://hub.darcs.net/thielema/blas-comfort-array/
 
@@ -35,7 +35,7 @@
     netlib-ffi >=0.0 && <0.2,
     comfort-array >=0.3 && <0.6,
     storable-complex >=0.2.2 && <0.3,
-    transformers >=0.4 && <0.6,
+    transformers >=0.4 && <0.7,
     base >=4.5 && <5
 
   GHC-Options:      -Wall -fwarn-missing-import-lists