diff --git a/.travis.yml b/.travis.yml
index ab63b6a2..a48e4200 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -2,7 +2,7 @@ language: haskell
 
 install:
     - cabal update
-    - cabal install --force-reinstalls hspec cabal-meta cabal-src
+    - cabal install --force-reinstalls hspec cabal-meta cabal-src alex
     - cabal-meta install --force-reinstalls
 
 script: