diff --git a/graphs.cabal b/graphs.cabal
--- a/graphs.cabal
+++ b/graphs.cabal
@@ -1,6 +1,6 @@
 name:          graphs
 category:      Data Structures
-version:       0.4
+version:       0.4.0.1
 license:       BSD3
 cabal-version: >= 1.6
 license-file:  LICENSE
@@ -26,7 +26,7 @@
     base         >= 4       && < 5,
     array        >= 0.4     && < 0.5,
     transformers >= 0.2.2   && < 0.4,
-    containers   >= 0.3     && < 0.5,
+    containers   >= 0.3     && < 0.6,
     void         >= 0.5.5.1 && < 0.6
 
   exposed-modules: