diff --git a/make-pages/make-pages.cabal b/make-pages/make-pages.cabal
index aff4102..3e9121f 100644
--- a/make-pages/make-pages.cabal
+++ b/make-pages/make-pages.cabal
@@ -72,7 +72,7 @@ executable make-pages
     time                  >= 1.8.0.2  && < 1.10,
     unordered-containers ^>= 0.2.11.0
   ghc-options:
-    -Wall -threaded -rtsopts -with-rtsopts=-N
+    -Wall -threaded -rtsopts -with-rtsopts=-N -O
   if flag(pretty-verbose)
     build-depends:
       pretty      ^>= 1.1.3.6,