diff --git a/mkdocs.yml b/mkdocs.yml
index 5ba20cb9..c8cd32f6 100644
--- a/mkdocs.yml
+++ b/mkdocs.yml
@@ -38,6 +38,7 @@ plugins:
       raise_error_excludes:
         429: ["https://github.com/ponylang", "https://web.archive.org/*"]
         404: ["https://github.com/ponylang"]
+        403: ["https://readthedocs.org"]
 
 theme:
   name: material