diff --git a/.travis.yml b/.travis.yml
index 194dc14b..91604893 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -13,7 +13,7 @@ os:
 before_install:
   - if [[ "$TRAVIS_OS_NAME" == "linux" ]]; then curl -o- -L https://yarnpkg.com/install.sh | bash; fi
   - if [[ "$TRAVIS_OS_NAME" == "linux" ]]; then export PATH="$HOME/.yarn/bin:$HOME/.config/yarn/global/node_modules/.bin:$PATH"; fi
-  - if [[ "$TRAVIS_OS_NAME" == "osx" ]]; then brew install yarn; fi
+  - if [[ "$TRAVIS_OS_NAME" == "osx" ]]; then brew upgrade && brew install yarn; fi
 
 script:
   - cd dnsfilter && go get -d -t . && go test