diff --git a/coroutine-object.cabal b/coroutine-object.cabal
--- a/coroutine-object.cabal
+++ b/coroutine-object.cabal
@@ -1,5 +1,5 @@
 Name:		coroutine-object
-Version:	0.2.0
+Version:	0.2.0.0
 Synopsis:       Object-oriented programming realization using coroutine 
 Description: 	Object-oriented programming realization using coroutine 
 License: 	BSD3
@@ -18,14 +18,14 @@
                    mtl>2, 
                    lens >= 2.5,
                    containers >= 0.4,
-                   transformers == 0.3.*, 
-                   transformers-free == 1.0.*, 
+                   transformers >= 0.3, 
+                   transformers-free >= 1.0, 
                    bytestring >= 0.9,
                    safecopy >= 0.6,
-                   uuid == 1.2.*,
-                   cereal == 0.3.*, 
+                   uuid > 1.2,
+                   cereal > 0.3, 
                    either >= 3.1 
-                   -- errors >= 1.3
+
   Other-Modules:   
   exposed-modules:
                    Control.Monad.Trans.Crtn