diff --git a/Doc/conf.py b/Doc/conf.py
index d7effe2572ec44..351af466213536 100644
--- a/Doc/conf.py
+++ b/Doc/conf.py
@@ -45,6 +45,7 @@
 _OPTIONAL_EXTENSIONS = (
     'notfound.extension',
     'sphinxext.opengraph',
+    'linklint.ext',
 )
 for optional_ext in _OPTIONAL_EXTENSIONS:
     try:
diff --git a/Doc/requirements.txt b/Doc/requirements.txt
index d0107744ecbe85..f8f3922ef5be18 100644
--- a/Doc/requirements.txt
+++ b/Doc/requirements.txt
@@ -18,4 +18,6 @@ sphinx-notfound-page~=1.0.0
 # to install that as well.
 python-docs-theme>=2023.3.1,!=2023.7
 
+git+https://github.com/nedbat/linklint
+
 -c constraints.txt