diff --git a/backend/src/api/network_api.py b/backend/src/api/network_api.py
index 66e508e..8aa3d39 100644
--- a/backend/src/api/network_api.py
+++ b/backend/src/api/network_api.py
@@ -542,7 +542,8 @@ async def websocket_network_state(ws: WebSocket) -> None:
 
     queue: Optional[asyncio.Queue] = None
     try:
-        await ws.send_json({"type": "network_state", "reason": "initial", "snapshot": build_full_state_payload()})
+        initial_snapshot = await asyncio.to_thread(build_full_state_payload)
+        await ws.send_json({"type": "network_state", "reason": "initial", "snapshot": initial_snapshot})
         queue = await broadcaster.subscribe()
 
         while True: