diff --git a/charset.cabal b/charset.cabal
--- a/charset.cabal
+++ b/charset.cabal
@@ -1,5 +1,5 @@
 name:          charset
-version:       0.3.1
+version:       0.3.1.1
 license:       BSD3
 license-File:  LICENSE
 copyright:     (c) Edward Kmett 2010-2012
@@ -29,8 +29,8 @@
     base                 >= 4       && < 5,
     array                >= 0.2     && < 0.5,
     bytestring           >= 0.9.2.1 && < 0.10,
-    containers           >= 0.2     && < 0.5,
-    semigroups           >= 0.8     && < 0.9,
+    containers           >= 0.2     && < 0.6,
+    semigroups           >= 0.8.3.1 && < 0.9,
     unordered-containers >= 0.1.4.6 && < 0.3
 
   exposed-modules: