diff --git a/monadic-arrays.cabal b/monadic-arrays.cabal
--- a/monadic-arrays.cabal
+++ b/monadic-arrays.cabal
@@ -1,6 +1,6 @@
 name:          monadic-arrays
 category:      Data Structures
-version:       0.2.0.2
+version:       0.2.1
 license:       BSD3
 cabal-version: >= 1.6
 license-file:  LICENSE
@@ -19,10 +19,10 @@
 
 library
   build-depends:
-    base >= 4 && < 5,
-    array >= 0.3.0.2 && < 0.5,
-    transformers >= 0.2.0 && < 0.3,
-    stm >= 2.1.2.1 && < 2.3
+    base         >= 4 && < 5,
+    array        >= 0.3.0.2 && < 0.5,
+    transformers >= 0.2.0 && < 0.4,
+    stm          >= 2.1.2.1 && < 2.4
 
   exposed-modules:
     Control.Monad.Array.Class