diff --git a/.travis.yml b/.travis.yml
index 9330bba..922bc57 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -30,6 +30,7 @@ install:
 
   # Install qt4 from third-party source
   # https://github.com/cartr/homebrew-qt4
+  - brew update
   - brew tap cartr/qt4
   - brew tap-pin cartr/qt4
   - brew install cartr/qt4/qt