diff --git a/.travis.yml b/.travis.yml
index 1a8df70..d8c6e86 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -7,7 +7,7 @@ before_install:
 - sudo pip install ansible==2.1.3.0
 install:
 - ansible-playbook --extra-vars="brozzler_pip_name=file://$TRAVIS_BUILD_DIR#egg=brozzler user=travis" --inventory-file=ansible/hosts-localhost ansible/playbook.yml
-- pip install $TRAVIS_BUILD_DIR warcprox>=2.1b1.dev71 pytest
+- pip install $TRAVIS_BUILD_DIR 'warcprox>=2.1b1.dev71' pytest
 script:
 - DISPLAY=:1 py.test -v tests
 after_failure: