diff --git a/Chart.cabal b/Chart.cabal
--- a/Chart.cabal
+++ b/Chart.cabal
@@ -1,5 +1,5 @@
 Name: Chart
-Version: 1.2.3
+Version: 1.2.4
 License: BSD3
 License-file: LICENSE
 Copyright: Tim Docker, 2006-2010
@@ -19,7 +19,7 @@
   Build-depends: base >= 3 && < 5
                , old-locale
                , time, mtl, array
-               , lens >= 3.9 && < 4.3
+               , lens >= 3.9 && < 4.4
                , colour >= 2.2.1 && < 2.4
                , data-default-class < 0.1
                , operational >= 0.2.2 && < 0.3