diff --git a/cache/handler/cache.go b/cache/handler/cache.go
index 0049448..2a8d086 100644
--- a/cache/handler/cache.go
+++ b/cache/handler/cache.go
@@ -2,6 +2,7 @@ package handler
 
 import (
 	"context"
+	"fmt"
 	"time"
 
 	"github.com/micro/micro/v3/service/errors"