diff --git a/CHANGES.markdown b/CHANGES.markdown
--- a/CHANGES.markdown
+++ b/CHANGES.markdown
@@ -1,3 +1,8 @@
+0.6.0.4 (19 March 2013)
+-----------------------
+
+* bump upper bound to allow QuickCheck-2.6
+
 0.6.0.3: 27 January 2013
 ------------------------
 
diff --git a/diagrams-contrib.cabal b/diagrams-contrib.cabal
--- a/diagrams-contrib.cabal
+++ b/diagrams-contrib.cabal
@@ -1,5 +1,5 @@
 name:                diagrams-contrib
-version:             0.6.0.3
+version:             0.6.0.4
 synopsis:            Collection of user contributions to diagrams EDSL
 description:         A collection of user contributions for diagrams,
                      an embedded domain-specific language for generation 
@@ -49,7 +49,7 @@
   other-modules:       Diagrams.TwoD.Path.Turtle.Tests
 
   build-depends:       HUnit                      >= 1.2 && < 1.3,
-                       QuickCheck                 >= 2.4 && < 2.6,
+                       QuickCheck                 >= 2.4 && < 2.7,
                        containers                 >= 0.3 && < 0.6,
                        test-framework             >= 0.4 && < 0.9,
                        test-framework-hunit       >= 0.2 && < 0.4,