diff --git a/package/linux/travis-setup.sh b/package/linux/travis-setup.sh
index b8f4b28a9..b81a59c00 100755
--- a/package/linux/travis-setup.sh
+++ b/package/linux/travis-setup.sh
@@ -36,6 +36,7 @@ elif [[ "$TRAVIS_OS_NAME" == "osx" ]]; then
         export PATH=${PATH}:${WXDIR}
         cd $TRAVIS_BUILD_DIR # go back to the build dir
     else
+        brew update
         brew install wxmac # install via homebrew
     fi
 fi