diff --git a/lib/config/definitions.js b/lib/config/definitions.js
index 2fb7ff986927804249c63055a66f22fd67d716e5..5f0b8719bac1154f4867c5e78dfd940fb11305d3 100644
--- a/lib/config/definitions.js
+++ b/lib/config/definitions.js
@@ -754,6 +754,12 @@ const options = [
       'to {{#if isMajor}}v{{{newMajor}}}{{else}}{{#if isSingleVersion}}v{{{toVersion}}}{{else}}{{{newValue}}}{{/if}}{{/if}}',
     cli: false,
   },
+  {
+    name: 'commitMessageSuffix',
+    description: 'Suffix to add to end of commit messages and PR titles.',
+    type: 'string',
+    cli: false,
+  },
   {
     name: 'prTitle',
     description:
diff --git a/test/workers/repository/updates/__snapshots__/flatten.spec.js.snap b/test/workers/repository/updates/__snapshots__/flatten.spec.js.snap
index 5d72240ee7442faac32f1cacb583f80f5c513c2d..3ad256d0c8dfe139c7e0a49d58e29887a03ef9da 100644
--- a/test/workers/repository/updates/__snapshots__/flatten.spec.js.snap
+++ b/test/workers/repository/updates/__snapshots__/flatten.spec.js.snap
@@ -16,6 +16,7 @@ Array [
     "commitMessageAction": "Update",
     "commitMessageExtra": "to {{#if isMajor}}v{{{newMajor}}}{{else}}{{#if isSingleVersion}}v{{{toVersion}}}{{else}}{{{newValue}}}{{/if}}{{/if}}",
     "commitMessagePrefix": null,
+    "commitMessageSuffix": null,
     "commitMessageTopic": "dependency {{depName}}",
     "copyLocalLibs": false,
     "depName": "@org/a",
@@ -77,6 +78,7 @@ Array [
     "commitMessageAction": "Update",
     "commitMessageExtra": "to {{#if isMajor}}v{{{newMajor}}}{{else}}{{#if isSingleVersion}}v{{{toVersion}}}{{else}}{{{newValue}}}{{/if}}{{/if}}",
     "commitMessagePrefix": null,
+    "commitMessageSuffix": null,
     "commitMessageTopic": "dependency {{depName}}",
     "copyLocalLibs": false,
     "depNameSanitized": undefined,
@@ -137,6 +139,7 @@ Array [
     "commitMessageAction": "Lock file maintenance",
     "commitMessageExtra": null,
     "commitMessagePrefix": null,
+    "commitMessageSuffix": null,
     "commitMessageTopic": null,
     "copyLocalLibs": false,
     "errors": Array [],
@@ -211,6 +214,7 @@ Array [
     "commitMessageAction": "Update",
     "commitMessageExtra": "to {{#if isMajor}}v{{{newMajor}}}{{else}}{{#if isSingleVersion}}v{{{toVersion}}}{{else}}{{{newValue}}}{{/if}}{{/if}}",
     "commitMessagePrefix": null,
+    "commitMessageSuffix": null,
     "commitMessageTopic": "{{{depName}}} Docker tag",
     "copyLocalLibs": false,
     "depName": "amd64/node",
diff --git a/website/docs/configuration-options.md b/website/docs/configuration-options.md
index 9c123dd8536ba2480d5f2661bbfef180aadf4b6f..986c61f4819a0e05417ca58f16de8ebbf1655335 100644
--- a/website/docs/configuration-options.md
+++ b/website/docs/configuration-options.md
@@ -120,6 +120,10 @@ This is used to alter `commitMessage` and `prTitle` without needing to copy/past
 
 This is used to alter `commitMessage` and `prTitle` without needing to copy/paste the whole string. The "prefix" is usually an automatically applied semantic commit prefix, however it can also be statically configured.
 
+## commitMessageSuffix
+
+This is used to add a suffix to commit messages. Usually left empty except for internal use (multiple base branches, and vulnerability alerts).
+
 ## commitMessageTopic
 
 This is used to alter `commitMessage` and `prTitle` without needing to copy/paste the whole string. The "topic" is usually refers to the dependency being updated, e.g. "dependency react".