diff --git a/docs/source/.readthedocs.yaml b/docs/source/.readthedocs.yaml
index 4fe605d33b34945b6ca91df094fa809ff4a0c713..e687c2fc633645c26368116939c8705d589c1799 100644
--- a/docs/source/.readthedocs.yaml
+++ b/docs/source/.readthedocs.yaml
@@ -3,7 +3,7 @@ version: 2
 build:
   os: "ubuntu-22.04"
   tools:
-    python: "3.10"
+    python: "3.9"
 
 sphinx:
   configuration: docs/config.py
@@ -13,7 +13,7 @@ formats:
   - pdf
   
 python:
-  # Install our python package before building the docs
+  version: 3.9
   install:
     - requirements: docs/requirements.txt
     - method: pip