diff --git a/ids/identity.py b/ids/identity.py
index 92b9409..a918f55 100644
--- a/ids/identity.py
+++ b/ids/identity.py
@@ -93,13 +93,16 @@ def register(
 ):
     logger.debug(f"Registering IDS identity for {handles}")
     uris = [{"uri": handle} for handle in handles]
-
+    import uuid
     body = {
         "device-name": "pypush",
         "hardware-version": "MacBookPro18,3",
         "language": "en-US",
         "os-version": "macOS,13.2.1,22D68",
         "software-version": "22D68",
+        "private-device-data": {
+            "u": uuid.uuid4().hex.upper(),
+        },
         "services": [
             {
                 "capabilities": [{"flags": 1, "name": "Messenger", "version": 1}],