diff --git a/.travis.yml b/.travis.yml
index 418720fd..32349c51 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -31,6 +31,8 @@ addons:
 os:
   - linux
   - osx
+    before_install:
+    - brew update
 language: cpp
 cache: ccache
 before_cache: