diff --git a/evaluate_server.py b/evaluate_server.py
index 3df0838..f86e3e3 100644
--- a/evaluate_server.py
+++ b/evaluate_server.py
@@ -56,6 +56,7 @@ def start_runner():
             time.sleep(10)
 
     thread = threading.Thread(target=start_loop)
+    thread.setDaemon(True)
     thread.start()
 
 @app.route('/battle_tick', methods=['POST'])