diff --git a/matplotlib.cabal b/matplotlib.cabal
--- a/matplotlib.cabal
+++ b/matplotlib.cabal
@@ -1,5 +1,5 @@
 name:                matplotlib
-version:             0.7.0
+version:             0.7.1
 synopsis:            Bindings to Matplotlib; a Python plotting library
 description:
     Matplotlib is probably the most full featured plotting library out there.
@@ -8,7 +8,7 @@
     .
     <<https://github.com/abarbu/matplotlib-haskell/raw/master/imgs/contour.png>>
     .
-    > onscreen $ contourF (\a b -> sin (degreesRadians a) + cos (degreesRadians b)) (-100) 100 (-200) 200 10
+    > onscreen $ contourF (\a b -> sin (a*pi/180.0) + cos (b*pi/180.0)) (-100) 100 (-200) 200 10
 homepage:            https://github.com/abarbu/matplotlib-haskell
 license:             BSD3
 license-file:        LICENSE