diff --git a/.readthedocs.yml b/.readthedocs.yml
index eb469ec5..2f24b7d6 100644
--- a/.readthedocs.yml
+++ b/.readthedocs.yml
@@ -9,7 +9,7 @@ version: 2
 build:
    os: ubuntu-22.04
    tools: 
-      python: 3.7
+      python: "3.7"
 
 # Build documentation in the docs/ directory with Sphinx
 sphinx: