diff --git a/{{cookiecutter.project_slug}}/.readthedocs.yml b/{{cookiecutter.project_slug}}/.readthedocs.yml
index 1b6020f3..05bdd515 100644
--- a/{{cookiecutter.project_slug}}/.readthedocs.yml
+++ b/{{cookiecutter.project_slug}}/.readthedocs.yml
@@ -4,6 +4,6 @@ sphinx:
   configuration: docs/conf.py
 
 python:
-  version: 3.9
+  image: testing
   install:
     - requirements: requirements/local.txt