diff --git a/.github/workflows/check-commits.yml b/.github/workflows/check-commits.yml
index 49388949..2a910035 100644
--- a/.github/workflows/check-commits.yml
+++ b/.github/workflows/check-commits.yml
@@ -33,3 +33,8 @@ jobs:
 
       - name: "📜 Validate commit messages"
         run: npx --no-install commitlint --from ${{ github.event.pull_request.base.sha }} --to ${{ github.event.pull_request.head.sha }} --verbose
+
+      - name: "📜 Validate PR title (used as squash commit message)"
+        env:
+          PR_TITLE: ${{ github.event.pull_request.title }}
+        run: printf '%s\n' "$PR_TITLE" | npx --no-install commitlint --verbose
diff --git a/commitlint.config.js b/commitlint.config.js
index 25d70148..40324c31 100644
--- a/commitlint.config.js
+++ b/commitlint.config.js
@@ -7,7 +7,7 @@ module.exports = {
   },
   rules: {
     'subject-case': [0],
-    'subject-full-stop': [0],
+    'subject-full-stop': [2, 'always', '.'],
     'header-max-length': [2, 'always', 78],
     'scope-enum': [
       2,