diff --git a/.travis.yml b/.travis.yml
index e50fb8b..cd409cd 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -49,6 +49,8 @@ sudo: required
 group: edge
 language: python
 python: "2.7.14"
+virtualenv:
+  system_site_packages: true
 cache:
   - apt