diff --git a/.readthedocs.yml b/.readthedocs.yml
index ef760972..8fbc4dc1 100644
--- a/.readthedocs.yml
+++ b/.readthedocs.yml
@@ -1,7 +1,7 @@
 version: 2
 
 python:
-  version: 3.9
+  version: "3.8"
   install:
     - method: pip
       path: .