diff --git a/.travis.yml b/.travis.yml
index 58bb9622789facd32f6f9451bff9f5d452c1ee3c..441319c0e75edbecc7659361afd1b6ed94c627a5 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -6,6 +6,7 @@ python:
   - "3.6"
   - "3.7"
   - "3.8"
+  - "3.9"
 env:
   - FLASK=1.1.2
   - FLASK=1.0.4