diff --git a/.readthedocs.yml b/.readthedocs.yml
index dc0ff792cd..e56b21f25d 100644
--- a/.readthedocs.yml
+++ b/.readthedocs.yml
@@ -3,11 +3,10 @@ mkdocs:
   configuration: mkdocs.yml
 
 python:
-  version: 3.9
   install:
     - requirements: docs/requirements.txt
 
 build:
     os: ubuntu-20.04
     tools:
-      python: 3.9
+      python: "3.9"