diff --git a/.readthedocs.yml b/.readthedocs.yml
index c6028a05..2ef05a17 100644
--- a/.readthedocs.yml
+++ b/.readthedocs.yml
@@ -6,7 +6,7 @@ sphinx:
 formats: all
 
 python:
-  version: 3.9
+  version: 3.8
   install:
     - method: pip
       path: .