diff --git a/CHANGES.markdown b/CHANGES.markdown
--- a/CHANGES.markdown
+++ b/CHANGES.markdown
@@ -1,3 +1,8 @@
+1.4.0.1 (13 November 2016)
+--------------------------
+
+- allow `cubicbezier-0.5`
+
 1.4 (2016-10-26)
 ----------------
 
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:             1.4
+version:             1.4.0.1
 synopsis:            Collection of user contributions to diagrams EDSL
 description:         A collection of user contributions for diagrams,
                      an embedded domain-specific language for generation
@@ -72,7 +72,7 @@
                        text >= 0.11 && < 1.3,
                        data-default-class < 0.2,
                        semigroups >= 0.3.4 && < 0.19,
-                       cubicbezier >= 0.4.0.1 && < 0.5,
+                       cubicbezier >= 0.4.0.1 && < 0.6,
                        hashable >= 0.1.2 && < 1.3,
                        mfsolve >= 0.3 && < 0.4
   hs-source-dirs:      src