diff --git a/CHANGES b/CHANGES
--- a/CHANGES
+++ b/CHANGES
@@ -1,3 +1,7 @@
+0.5.0.2 : 13 May 2012
+
+  * Allow building under mtl 2.1.*
+
 0.5.0.1 : 9 March 2012
 
   * Remove statement in package description that a development version
diff --git a/diagrams-cairo.cabal b/diagrams-cairo.cabal
--- a/diagrams-cairo.cabal
+++ b/diagrams-cairo.cabal
@@ -1,5 +1,5 @@
 Name:                diagrams-cairo
-Version:             0.5.0.1
+Version:             0.5.0.2
 Synopsis:            Cairo backend for diagrams drawing EDSL
 Description:         A full-featured backend for rendering
                      diagrams using the cairo rendering engine.
@@ -26,7 +26,7 @@
                        Diagrams.Backend.Cairo.Text
   Hs-source-dirs:      src
   Build-depends:       base >= 4.2 && < 4.6,
-                       mtl >= 2.0 && < 2.1,
+                       mtl >= 2.0 && < 2.2,
                        process >= 1.0 && < 1.2,
                        directory >= 1.0 && < 1.2,
                        filepath >= 1.1 && < 1.4,