diff --git a/.travis.yml b/.travis.yml
index 6ca42c687..04441e311 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -2,6 +2,8 @@ language: python3
 cache:
   directories:
     - __pycache__
+python:
+- "3.6"
 before_install:
 - sudo pip install -r requirements.txt
 script: