diff --git a/.travis.yml b/.travis.yml
index bf1ddf1..69f98d3 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -8,7 +8,7 @@ python:
 before_install:
   # work around https://github.com/travis-ci/travis-ci/issues/8363
   - pyenv install 3.5.4
-  - pyenv global system 3.5
+  - pyenv global system 3.5.4
 
 env:
   - TOX_ENV=py35-django-18