diff --git a/CHANGES.md b/CHANGES.md
--- a/CHANGES.md
+++ b/CHANGES.md
@@ -1,3 +1,8 @@
+0.2.2.4 (20 March 2014)
+----------------------
+
+  - allow `lens-4.1`
+
 0.2.2.3 (8 March 2014)
 ----------------------
 
diff --git a/diagrams-haddock.cabal b/diagrams-haddock.cabal
--- a/diagrams-haddock.cabal
+++ b/diagrams-haddock.cabal
@@ -1,5 +1,5 @@
 name:                diagrams-haddock
-version:             0.2.2.3
+version:             0.2.2.4
 synopsis:            Preprocessor for embedding diagrams in Haddock documentation
 description:         diagrams-haddock is a tool for compiling embedded inline
                      diagrams code in Haddock documentation, for an
@@ -48,7 +48,7 @@
                        diagrams-lib >= 0.6 && < 1.2,
                        diagrams-svg >= 0.8.0.1 && < 1.1,
                        vector-space >= 0.8 && < 0.9,
-                       lens >= 3.8 && < 4.1,
+                       lens >= 3.8 && < 4.2,
                        cpphs >= 1.15,
                        cautious-file >= 1.0 && < 1.1,
                        uniplate >= 1.6 && < 1.7,
@@ -81,7 +81,7 @@
                        test-framework-quickcheck2 >= 0.3 && < 0.4,
                        parsec >= 3,
                        haskell-src-exts >= 1.14 && < 1.15,
-                       lens >= 3.8 && < 4.1,
+                       lens >= 3.8 && < 4.2,
                        diagrams-haddock
   hs-source-dirs:      test
   default-language:    Haskell2010