diff --git a/Numeric/Optimization/Algorithms/CMAES.hs b/Numeric/Optimization/Algorithms/CMAES.hs
--- a/Numeric/Optimization/Algorithms/CMAES.hs
+++ b/Numeric/Optimization/Algorithms/CMAES.hs
@@ -1,4 +1,4 @@
-{-# LANGUAGE PackageImports, RankNTypes, RecordWildCards,ScopedTypeVariables #-}
+{-# LANGUAGE FlexibleContexts, PackageImports, RankNTypes, RecordWildCards,ScopedTypeVariables #-}
 {-# OPTIONS -Wall #-}
 
 
@@ -253,7 +253,7 @@
 
 
 
--- | Silently check for python version and place the correct shebang 
+-- | Silently check for python version and place the correct shebang
 wrapperFnFullPath :: FilePath
 wrapperFnFullPath = unsafePerformIO $ do
   fullFn <- getDataFileName wrapperFn
@@ -261,14 +261,14 @@
   str <- hGetContents hin
   _ <- waitForProcess hproc
   let pythonVersion :: Int
-      pythonVersion = read $ take 1 $ atDef "2" (words str) 1 
-  
+      pythonVersion = read $ take 1 $ atDef "2" (words str) 1
+
       correctShebang
         | pythonVersion == 2 = "#!/usr/bin/env python"
         | otherwise          = "#!/usr/bin/env python2"
 
   wrapperLines <- lines <$> Strict.readFile fullFn
-    
+
   when (headDef "" wrapperLines /= correctShebang) $ do
     writeFile fullFn $ unlines $ correctShebang : drop 1 wrapperLines
 
diff --git a/cmaes.cabal b/cmaes.cabal
--- a/cmaes.cabal
+++ b/cmaes.cabal
@@ -1,5 +1,5 @@
 name:                cmaes
-version:             0.2.2
+version:             0.2.2.1
 synopsis:            CMA-ES wrapper in Haskell
 description:
 
@@ -30,15 +30,15 @@
 Data-Files:          cma.py, cmaes_wrapper.py
 
 library
-  exposed-modules:   Numeric.Optimization.Algorithms.CMAES  
+  exposed-modules:   Numeric.Optimization.Algorithms.CMAES
   other-modules:     Paths_cmaes
   build-depends:     base ==4.*
-                   , mtl  
+                   , mtl
                    , process
                    , safe >= 0.3
                    , strict >= 0.3.2
                    , syb
-                   
+
 Test-Suite test
   Main-Is:           doctest.hs
   hs-source-dirs:    test/
@@ -47,7 +47,7 @@
                    , cmaes
                    , doctest >=0.8
                    , doctest-prop >=0.2
-                   , mtl  
+                   , mtl
                    , process
                    , random
                    , syb