diff --git a/Doc/conf.py b/Doc/conf.py
index d7effe2572ec44..2721e376298bc1 100644
--- a/Doc/conf.py
+++ b/Doc/conf.py
@@ -39,6 +39,7 @@
     'sphinx.ext.coverage',
     'sphinx.ext.doctest',
     'sphinx.ext.extlinks',
+    'linklint.ext',
 ]
 
 # Skip if downstream redistributors haven't installed them
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