diff --git a/config_manager/config.go b/config_manager/config.go
index f3cadce..72e3902 100644
--- a/config_manager/config.go
+++ b/config_manager/config.go
@@ -18,7 +18,7 @@ type Schedule struct {
 
 type Keys struct {
 	Metric string `json:"metric"`
-	key    string `json:"key"`
+	Key    string `json:"key"`
 }
 
 type QueryInfo struct {