diff --git a/app/invokers/webhook_invoker.py b/app/invokers/webhook_invoker.py
index 54fe137..26cc480 100644
--- a/app/invokers/webhook_invoker.py
+++ b/app/invokers/webhook_invoker.py
@@ -297,9 +297,8 @@ def validate_incoming_signature(self, msg: dict) -> bool:
         # Remove the headers to avoid them being used in the signature verification
         del msg["headers"]["X-Port-Signature"]
         del msg["headers"]["X-Port-Timestamp"]
-
         expected_sig = sign_sha_256(
-            json.dumps(msg, separators=(",", ":")),
+            json.dumps(msg, separators=(",", ":"), ensure_ascii=False),
             settings.PORT_CLIENT_SECRET,
             port_timestamp,
         )