diff --git a/components/orchestration/orchestrator.py b/components/orchestration/orchestrator.py
index 2259bcd..7e8054e 100644
--- a/components/orchestration/orchestrator.py
+++ b/components/orchestration/orchestrator.py
@@ -17,7 +17,7 @@ sys.modules['target_velocity'] = target_velocity
 
 class Orchestrator:
     # vehicle ids
-    vins: List[str] = set()
+    vins: List[str] = []
     # traffic lights {tlid: {color: color, switching_time: in_seconds}}
     tls: Dict[str, Dict] = {}