diff --git a/.travis.yml b/.travis.yml
index 8219d49a..f49500b6 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -11,6 +11,7 @@ git:
 
 before_install:
   - date
+  - pip install --upgrade virtualenv
 
 install:
   - pip install poetry~=0.12.17