diff --git a/.travis.yml b/.travis.yml
index 1f82172c..97d8f77d 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -30,6 +30,7 @@ before_install:
   PIP=pip
   PY=python
   if [[ "$TRAVIS_OS_NAME" == "osx" ]]; then
+    sudo softwareupdate -i "Command Line Tools (macOS High Sierra version 10.13) for Xcode-9.3"
     brew update
     brew install gcc
     PIP=pip2