diff --git a/deployment/system-config.md b/deployment/system-config.md
index 6bba2188..7eaa8428 100644
--- a/deployment/system-config.md
+++ b/deployment/system-config.md
@@ -35,7 +35,7 @@ Specify root directory.
 
 | type | default | version |
 |:-----|:--------|:--------|
-| enum | nil     | 0.14.0  |
+| enum | "info"  | 0.14.0  |
 
 Specify log\_level. Users can choose `trace`, `debug`, `info`, `warn`,
 `error`, and `fatal` level.