diff --git a/.ci/travis-install.sh b/.ci/travis-install.sh
index 8f04333..4385ba1 100755
--- a/.ci/travis-install.sh
+++ b/.ci/travis-install.sh
@@ -4,7 +4,7 @@ set -e -x
 
 if [ "${TRAVIS_OS_NAME}" == "osx" ]; then
     # https://github.com/travis-ci/travis-ci/issues/6307#issuecomment-233315824
-    rvm get stable
+    rvm get head
 
     git clone --depth 1 https://github.com/yyuu/pyenv.git ~/.pyenv
     PYENV_ROOT="$HOME/.pyenv"