diff --git a/scripts/stop_server.sh b/scripts/stop_server.sh
index 8054b30..5a2974c 100644
--- a/scripts/stop_server.sh
+++ b/scripts/stop_server.sh
@@ -1 +1,5 @@
-sudo kill -9 $(sudo lsof -t -i:5000)
+PID=$(sudo lsof -t -i:5000)
+
+if [ -n "$PID" ]; then
+  sudo kill -9 $PID
+fi