diff --git a/.readthedocs.yaml b/.readthedocs.yaml
index 8853551e..e747cb46 100644
--- a/.readthedocs.yaml
+++ b/.readthedocs.yaml
@@ -11,7 +11,7 @@ build:
     post_checkout:
       - git fetch --tags
 
-    # Replace versions in sponsor URLs
+    # Replace versions in sponsor URLs.
     pre_build:
       - python -Im pip install tox-uv
       - python -Im tox run -e docs-sponsors