diff --git a/tools/travis_setup.sh b/tools/travis_setup.sh
index f3caaa5e..96231139 100755
--- a/tools/travis_setup.sh
+++ b/tools/travis_setup.sh
@@ -20,3 +20,7 @@ python check_bento_build.py
 
 tools/header.py "Dependency versions"
 tools/build_versions.py
+
+# clean up disk space
+sudo apt-get clean
+sudo rm -r /tmp/*