diff --git a/doc/conf.py b/doc/conf.py
index b1b5d873a..49fcba462 100644
--- a/doc/conf.py
+++ b/doc/conf.py
@@ -103,7 +103,7 @@ latex_use_xindy = True
 linkcheck_timeout = 5
 linkcheck_ignore = [
     r'^contents\.html$',  # extra generated page
-    '^\.\./contents\.html$',
+    r'^\.\./contents\.html$',
     re.escape('https://gitlab.com/projects/new'),  # requires sign-in
     re.escape('https://web.libera.chat/?channel=#sphinx-doc'),
 ]