diff --git a/CHANGELOG.rst b/CHANGELOG.rst
index 49afc927c5..4d876b88f3 100644
--- a/CHANGELOG.rst
+++ b/CHANGELOG.rst
@@ -2,6 +2,14 @@
 Changelog
 =========
 
+2.5.13 addendum (2024-09-24)
+============================
+
+2.5.13 was the final bugfix release in the ``2.5.x`` series.
+
+Since then, no bugfixes become available to release. This version is now no longer
+supported.
+
 2.7.7 (2024-09-23)
 ==================
 
diff --git a/docker/ci/config.json b/docker/ci/config.json
index 0f520ef865..484e0c358b 100644
--- a/docker/ci/config.json
+++ b/docker/ci/config.json
@@ -14,11 +14,6 @@
       "gitRef": "stable/2.6.x",
       "tag": null,
       "hasExtensionsVariant": true
-    },
-    {
-      "gitRef": "stable/2.5.x",
-      "tag": null,
-      "hasExtensionsVariant": true
     }
   ],
   "availableExtensions": [