diff --git a/.github/mergify.yml b/.github/mergify.yml
index 6249873e..d7bc2ce4 100644
--- a/.github/mergify.yml
+++ b/.github/mergify.yml
@@ -6,4 +6,15 @@ pull_request_rules:
     actions:
       label:
         toggle:
-          - ci-passed
\ No newline at end of file
+          - ci-passed
+  - name: "Ensure commits follow DCO"
+    conditions:
+      - "#commits > 0"
+      - "body~Signed-off-by:"
+    actions:
+      comment:
+        message: |
+          ⚠️ Your PR is missing a `Signed-off-by:` line in at least one commit.
+          Please use `git commit -s` to sign your commits.
+      dismiss_reviews:
+        message: "DCO check failed. Please sign your commits."
\ No newline at end of file