diff --git a/language-spelling.cabal b/language-spelling.cabal
--- a/language-spelling.cabal
+++ b/language-spelling.cabal
@@ -1,6 +1,6 @@
 Cabal-Version:      >= 1.8
 Name:               language-spelling
-Version:            0.3
+Version:            0.3.1
 Author:             Francesco Mazzoli (f@mazzo.li)
 Maintainer:         Francesco Mazzoli (f@mazzo.li)
 Build-Type:         Simple
@@ -53,7 +53,7 @@
                       bk-tree,
                       tst
 
-    GHC-Options:      -Werror -O2
+    GHC-Options:      -Wall -O2
 
     Exposed-Modules:  Language.Distance,
                       Language.Distance.Internal,
@@ -72,7 +72,7 @@
 
     Main-Is:          bench.hs
 
-    GHC-Options:      -O2 -Werror
+    GHC-Options:      -O2 -Wall
 
     Build-Depends:    base,
                       criterion,