diff --git a/.travis.yml b/.travis.yml
index 2aef67079..7681af537 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -19,7 +19,7 @@ env:
 install:
   - pip install -U pip
   - pip uninstall -y setuptools
-  - pip install setuptools<$SETUPTOOLS
+  - pip install "setuptools<$SETUPTOOLS"
   - pip install -r requirements.txt
   - python setup.py sdist
   - pip install dist/*