diff --git a/Chart-gtk.cabal b/Chart-gtk.cabal
--- a/Chart-gtk.cabal
+++ b/Chart-gtk.cabal
@@ -1,5 +1,5 @@
 Name: Chart-gtk
-Version: 1.9.1
+Version: 1.9.3
 License: BSD3
 License-file: LICENSE
 Copyright: Tim Docker, 2006-2014
@@ -19,7 +19,6 @@
                , cairo >= 0.9.11
                , data-default-class < 0.2
                , colour >= 2.2.1 && < 2.4
-               , colour >= 2.2.1
                , gtk >= 0.9.11
                , Chart >= 1.9 && < 1.10
                , Chart-cairo >= 1.9 && < 1.10