diff --git a/prometheus-grafana/docker-compose.yml b/prometheus-grafana/docker-compose.yml
index 8ca5693..c38f270 100644
--- a/prometheus-grafana/docker-compose.yml
+++ b/prometheus-grafana/docker-compose.yml
@@ -29,4 +29,5 @@ networks:
 volumes:
     grafana-storage:
         name: grafana-storage
+        external: true
     prometheus-data: