diff --git a/registry/event.go b/registry/event.go
index 94ada0cc8b1ecb6a7610d8d7997f1c009d95483c..6f647185cc213b80b9ab25b4702f91b36aa8ad4b 100644
--- a/registry/event.go
+++ b/registry/event.go
@@ -19,13 +19,13 @@ package registry
 
 import (
 	"fmt"
-	"github.com/apache/dubbo-go/common/observer"
 	"math/rand"
 	"time"
 )
 
 import (
 	"github.com/apache/dubbo-go/common"
+	"github.com/apache/dubbo-go/common/observer"
 	"github.com/apache/dubbo-go/remoting"
 )