diff --git a/mgdsoft/stackdriver-bundle/0.1/config/packages/prod/mgdsoft_stackdriver.yaml b/mgdsoft/stackdriver-bundle/0.1/config/packages/prod/mgdsoft_stackdriver.yaml
index 0d951a4d..22f3d807 100644
--- a/mgdsoft/stackdriver-bundle/0.1/config/packages/prod/mgdsoft_stackdriver.yaml
+++ b/mgdsoft/stackdriver-bundle/0.1/config/packages/prod/mgdsoft_stackdriver.yaml
@@ -1,4 +1,4 @@
 mgdsoft_stackdriver:
     # to test in local
-    # credentials_json_file: ~
+    # credentials_json_file: null
     level: info