diff --git a/.readthedocs.yml b/.readthedocs.yml
index d1e3f47..6ec71db 100644
--- a/.readthedocs.yml
+++ b/.readthedocs.yml
@@ -4,7 +4,7 @@ sphinx:
   configuration: docs/conf.py
 
 python:
-  version: 3.9
+  version: 3.8
   install:
     - requirements: docs/requirements.txt
     - requirements: requirements.txt