diff --git a/.travis.yml b/.travis.yml
index c944f922..8082e05f 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -7,6 +7,7 @@ python:
   - "3.6"
   - "3.5"
   - "2.7"
+  - "3.9-dev"
 
 cache: pip