diff --git a/contrib/config/apollo/apollo.go b/contrib/config/apollo/apollo.go
index 5d82d2931..acf767cac 100644
--- a/contrib/config/apollo/apollo.go
+++ b/contrib/config/apollo/apollo.go
@@ -18,8 +18,8 @@ type apollo struct {
 
 const (
     yaml       = "yaml"
-    json       = "json"
     yml        = "yml"
+    json       = "json"
     properties = "properties"
 )