diff --git a/.readthdocs.yaml b/.readthdocs.yaml
index af7a17f..b556273 100644
--- a/.readthdocs.yaml
+++ b/.readthdocs.yaml
@@ -19,6 +19,6 @@ formats:
 
 # Optionally set the version of Python and requirements required to build your docs
 python:
-  version: 3.9
+  version: 3.8
   install:
     - requirements: doc/requirements.txt