diff --git a/.travis.yml b/.travis.yml
index c270a9d..8a274b0 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,6 +1,6 @@
 language: python
 python:
-  - "3.6"
+  - "3.9"
 # command to install dependencies
 before_install:
   # for WeasyPrint: https://doc.courtbouillon.org/weasyprint/stable/first_steps.html#ubuntu-20-04