diff --git a/.travis.yml b/.travis.yml
index 98a8d95..5945f3e 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -32,7 +32,7 @@ matrix:
     - env: TOXENV=py35-master
 
 install:
-  - pip install tox
+  - pip install tox "virtualenv<14.0"
 
 script:
   - tox