diff --git a/.travis.yml b/.travis.yml
index f4709afe..66c1bc8c 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -13,6 +13,7 @@ addons:
       - texinfo
 script:
   - if [[ "${TRAVIS_OS_NAME}" == "osx" ]]; then
+       brew update;
        brew install yasm;
     fi
   # On OSX, gcc is a wrapper around clang, so use gcc from homebrew