diff --git a/main.py b/main.py
index 3e38de1..b6fe886 100644
--- a/main.py
+++ b/main.py
@@ -155,7 +155,7 @@ async def fastapi_run_project(network: str) -> str:
         raise HTTPException(status_code=400, detail="is in simulation")
     else:
         try:
-            app.state.lock.acquire()  # Acquire the lock
+            await app.state.lock.acquire()  # Acquire the lock
             result = run_project(network)
             return result
         except asyncio.CancelledError: