diff --git a/Doc/tools/extensions/pyspecific.py b/Doc/tools/extensions/pyspecific.py
index f9bf273e7624a04..85e7f5454252d2a 100644
--- a/Doc/tools/extensions/pyspecific.py
+++ b/Doc/tools/extensions/pyspecific.py
@@ -22,7 +22,7 @@
 from sphinx.util.docutils import SphinxDirective
 
 # Used in conf.py and updated here by python/release-tools/run_release.py
-SOURCE_URI = 'https://github.com/python/cpython/tree/main/%s'
+SOURCE_URI = 'https://github.com/python/cpython/tree/3.15/%s'
 
 class PyAwaitableMixin(object):
     def handle_signature(self, sig, signode):