diff --git a/svitak.cabal b/svitak.cabal
index 8e9064e..749fdd6 100644
--- a/svitak.cabal
+++ b/svitak.cabal
@@ -45,7 +45,7 @@ maintainer:         oijrewgoijreg@eaoigjoirejg.com
 build-type:         Simple
 
 common warnings
-    ghc-options: -Wall
+    ghc-options: -Wall -threaded -O
 
 executable svitak
     import:           warnings