diff --git a/peps/pep-0101.rst b/peps/pep-0101.rst
index b57b871ebe4..95f32edaeff 100644
--- a/peps/pep-0101.rst
+++ b/peps/pep-0101.rst
@@ -667,6 +667,8 @@ permissions.
 
   - Update python-releases.toml_ to reflect the new branches and versions.
 
+  - Add entries for the new branch to dependabot.yml_ on the ``main`` branch.
+
   - Create a PR to update the supported releases table on the
     `downloads page <https://www.python.org/downloads/>`__ (see
     `python/pythondotorg#1302 <https://github.com/python/pythondotorg/issues/1302>`__).
@@ -691,6 +693,13 @@ permissions.
   - Verify that the `online docs <https://docs.python.org/>`__ are building
     properly (this may take up to 24 hours for a complete build on the website).
 
+- If this is a **begin security-only mode** release, update the development
+  infrastructure to reflect the branch's new status. These include:
+
+  - In python-releases.toml_, set the branch status to "security".
+
+  - Remove the branch's entries marked as bugfix-only from dependabot.yml_ on
+    the ``main`` branch.
 
 What Next?
 ==========
@@ -735,7 +744,10 @@ else does them.  Some of those tasks include:
 
         git push upstream --delete 3.3  # or perform from GitHub Settings page
 
-- In python-releases.toml_, set the branch status to end-of-life.
+- In python-releases.toml_, set the branch status to "end-of-life".
+
+- Remove the branch's remaining entries from dependabot.yml_ on the ``main``
+  branch.
 
 - Update or remove references to the branch in the `developer's guide
   <https://github.com/python/devguide/>`__.
@@ -744,7 +756,7 @@ else does them.  Some of those tasks include:
 
   * update issues from this version to the next supported version
 
-  * remove version label from list of versions
+  * archive version label from list of versions
 
   * remove the ``needs backport to`` label for the retired version
 
@@ -803,6 +815,7 @@ This document has been placed in the public domain.
 
 .. _blog.python.org: https://blog.python.org
 .. _deferred-blocker: https://github.com/python/cpython/labels/deferred-blocker
+.. _dependabot.yml: https://github.com/python/cpython/blob/HEAD/.github/dependabot.yml
 .. _discuss.python.org: https://discuss.python.org
 .. _issue tracker: https://github.com/python/cpython/issues
 .. _python-releases.toml: https://github.com/python/peps/blob/HEAD/release_management/python-releases.toml