diff --git a/.travis.yml b/.travis.yml
index 5f82ccd6..890e8d7c 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -19,7 +19,7 @@ install:
 
 script:
   - stack setup
-  - stack build --pedantic
+  - stack build --ghc-options "-Werror"
   - stack test
 
 cache: