diff --git a/.github/workflows/auto-merge.yml b/.github/workflows/auto-merge.yml
index 1f52d7d..5ad2ebb 100644
--- a/.github/workflows/auto-merge.yml
+++ b/.github/workflows/auto-merge.yml
@@ -17,11 +17,34 @@ jobs:
         with:
           github-token: "${{ secrets.GITHUB_TOKEN }}"
 
+      - name: Check for major version bumps in PR body
+        if: steps.metadata.outputs.update-type == ''
+        id: check-major
+        env:
+          PR_BODY: ${{ github.event.pull_request.body }}
+        run: |
+          # Parse "from X to Y" version pairs from the PR body and flag major bumps.
+          HAS_MAJOR=false
+          while IFS= read -r line; do
+            from_ver=$(echo "$line" | sed -n 's/.*from \([0-9][0-9.]*\) to \([0-9][0-9.]*\).*/\1/p')
+            to_ver=$(echo "$line" | sed -n 's/.*from \([0-9][0-9.]*\) to \([0-9][0-9.]*\).*/\2/p')
+            [ -z "$from_ver" ] && continue
+            from_major="${from_ver%%.*}"
+            to_major="${to_ver%%.*}"
+            if [ "$from_major" != "$to_major" ]; then
+              echo "Major bump detected: $from_ver -> $to_ver"
+              HAS_MAJOR=true
+            fi
+          done <<< "$PR_BODY"
+          echo "has_major=$HAS_MAJOR" >> "$GITHUB_OUTPUT"
+
       - name: Approve PR
         if: >-
-          (contains(steps.metadata.outputs.update-type, 'version-update:semver-minor') ||
+          ((contains(steps.metadata.outputs.update-type, 'version-update:semver-minor') ||
           contains(steps.metadata.outputs.update-type, 'version-update:semver-patch')) &&
-          !contains(steps.metadata.outputs.update-type, 'version-update:semver-major')
+          !contains(steps.metadata.outputs.update-type, 'version-update:semver-major')) ||
+          (steps.metadata.outputs.update-type == '' &&
+          steps.check-major.outputs.has_major != 'true')
         run: gh pr review --approve "$PR_URL"
         env:
           PR_URL: ${{ github.event.pull_request.html_url }}
@@ -29,9 +52,11 @@ jobs:
 
       - name: Enable auto-merge for minor and patch updates
         if: >-
-          (contains(steps.metadata.outputs.update-type, 'version-update:semver-minor') ||
+          ((contains(steps.metadata.outputs.update-type, 'version-update:semver-minor') ||
           contains(steps.metadata.outputs.update-type, 'version-update:semver-patch')) &&
-          !contains(steps.metadata.outputs.update-type, 'version-update:semver-major')
+          !contains(steps.metadata.outputs.update-type, 'version-update:semver-major')) ||
+          (steps.metadata.outputs.update-type == '' &&
+          steps.check-major.outputs.has_major != 'true')
         run: gh pr merge --auto --squash "$PR_URL"
         env:
           PR_URL: ${{ github.event.pull_request.html_url }}