--- haskell-charset-0.3.7.1.orig/charset.cabal
+++ haskell-charset-0.3.7.1/charset.cabal
@@ -27,7 +27,7 @@ library
     base                 >= 4       && < 5,
     array                >= 0.2     && < 0.6,
     bytestring           >= 0.9     && < 0.11,
-    containers           >= 0.2     && < 0.6,
+    containers           >= 0.2     && < 0.7,
     semigroups           >= 0.8.3.1 && < 1,
     unordered-containers >= 0.1.4.6 && < 0.3
 
