diff --git a/chart-histogram.cabal b/chart-histogram.cabal
--- a/chart-histogram.cabal
+++ b/chart-histogram.cabal
@@ -1,12 +1,12 @@
 Name:                chart-histogram
-Version:             0.4.1
+Version:             0.4.2
 Synopsis:            Easily render histograms with Chart
 Description:         A library for rendering histograms with the Chart library
 License:             BSD3
 License-file:        LICENSE
 Author:              Ben Gamari
 Maintainer:          bgamari.foss@gmail.com
-Copyright:           Ben Gamari 2013
+Copyright:           (c) 2014 Ben Gamari
 Category:            Graphics
 Build-type:          Simple
 Cabal-version:       >=1.6
@@ -21,8 +21,8 @@
 
   Build-depends:       base >=4.6 && <4.9,
                        vector >=0.9 && <0.11,
-                       lens >=4.2 && <4.5,
+                       lens >=3.9 && <4.5,
                        data-default >=0.5 && <0.6,
-                       colour >=2.3 && <2.4,
+                       colour >=2.2.1 && <2.4,
                        Chart >=1.0 && <1.4