--- haskell-hierarchical-clustering-0.4.6.orig/hierarchical-clustering.cabal
+++ haskell-hierarchical-clustering-0.4.6/hierarchical-clustering.cabal
@@ -88,7 +88,7 @@ Library
   Build-depends:
       base       == 4.*
     , array      >= 0.3 && < 0.6
-    , containers >= 0.3 && < 0.6
+    , containers >= 0.3 && < 0.7
   GHC-options: -Wall
 
 Test-suite runtests
