diff --git a/nlp-scores.cabal b/nlp-scores.cabal
--- a/nlp-scores.cabal
+++ b/nlp-scores.cabal
@@ -7,7 +7,7 @@
 -- The package version. See the Haskell package versioning policy
 -- (http://www.haskell.org/haskellwiki/Package_versioning_policy) for
 -- standards guiding when and how versions should be incremented.
-Version:             0.2.2
+Version:             0.2.3
 
 -- A short (one-line) description of the package.
 Synopsis:            Scoring functions commonly used for evaluation in NLP and IR
@@ -57,4 +57,4 @@
   
   -- Extra tools (e.g. alex, hsc2hs, ...) needed to build the source.
   -- Build-tools:         
-  
+  GHC-options: -O2