diff --git a/tik_tok/md_tik_tok_activity.go b/tik_tok/md_tik_tok_activity.go
index e829d47..023bff2 100644
--- a/tik_tok/md_tik_tok_activity.go
+++ b/tik_tok/md_tik_tok_activity.go
@@ -1,7 +1,7 @@
 package tik_tok
 
 type TikTokActivity struct {
-	ActivityId      string `json:"activity_id"`
+	ActivityId      int    `json:"activity_id"`
 	ActivityName    string `json:"activity_name"`
 	ActivityEndTime string `json:"activity_end_time"`
 }