diff --git a/simulator.py b/simulator.py
index f1b9d7da..d035cb8c 100644
--- a/simulator.py
+++ b/simulator.py
@@ -797,13 +797,26 @@ def _or_put(asset_id: str, payload: dict) -> bool:
     if not token:
         return False
     try:
+        # Récupérer la version actuelle de l'asset
+        get_url = f"{OR_URL}/api/{OR_REALM}/asset/{asset_id}"
+        get_req = urllib.request.Request(get_url, headers={"Authorization": f"Bearer {token}"})
+        version = 1
+        try:
+            with urllib.request.urlopen(get_req, timeout=5) as resp:
+                asset_data = json.loads(resp.read().decode())
+                version = asset_data.get("version", 1)
+        except:
+            pass  # Si GET échoue, utiliser version=1
+
+        # Ajouter la version au payload
+        payload["version"] = version
         body = json.dumps(payload).encode()
         url = f"{OR_URL}/api/{OR_REALM}/asset/{asset_id}"
         req = urllib.request.Request(url, data=body,
                                     headers={
                                         "Authorization": f"Bearer {token}",
                                         "Content-Type": "application/json",
-                                        "If-Match": str(payload.get("version", 1)),
+                                        "If-Match": str(version),
                                     },
                                     method="PUT")
         with http_request_duration.labels(broker="openremote", method="PUT").time():