diff --git a/readthedocs.yaml b/readthedocs.yaml
index 3415671..1f2b89d 100644
--- a/readthedocs.yaml
+++ b/readthedocs.yaml
@@ -3,7 +3,7 @@ version: 2
 build:
   os: ubuntu-22.04
   tools:
-    python: 3.12
+    python: "3.12"
 
 sphinx:
   configuration: docs/source/conf.py