diff --git a/.readthedocs.yaml b/.readthedocs.yaml
index 4c78174e..223d24db 100644
--- a/.readthedocs.yaml
+++ b/.readthedocs.yaml
@@ -5,7 +5,7 @@ build:
   apt_packages:
     - imagemagick
   tools:
-    python: 3.12
+    python: "3.12"
 
 formats:
   - epub