diff --git a/docker-compose.yml b/docker-compose.yml
index 5fa92b8..0838cb0 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -37,6 +37,6 @@ networks:
   monitoring:
 volumes:
   grafana-volume:
-    external: 'true'
+    external: true
   influxdb-volume:
-    external: 'true'
\ No newline at end of file
+    external: true
\ No newline at end of file