diff --git a/.readthedocs.yml b/.readthedocs.yml
index bf28027126..acbb904dc8 100644
--- a/.readthedocs.yml
+++ b/.readthedocs.yml
@@ -8,7 +8,7 @@ version: 2
 build:
   os: ubuntu-20.04
   tools:
-    python: "3.9"
+    python: "3.8"
 
 python:
   install: