diff --git a/travis_config.sh b/travis_config.sh
index a37e816066cc3495615bbe74185d9f8781f15536..f72480eb92b6e889489fb54a631ad03a435de18f 100644
--- a/travis_config.sh
+++ b/travis_config.sh
@@ -90,6 +90,7 @@ function pre_build {
     local CACHE_STAGE; (echo "$TRAVIS_BUILD_STAGE_NAME" | grep -qiF "final") || CACHE_STAGE=1
 
     export HOMEBREW_FORCE_VENDOR_RUBY=1
+    brew style
     brew update
 
     #after the cache stage, all bottles and Homebrew metadata should be already cached locally