diff --git a/app/models/user_wechat.rb b/app/models/user_wechat.rb
index 8328a47df..c63411ab3 100644
--- a/app/models/user_wechat.rb
+++ b/app/models/user_wechat.rb
@@ -22,5 +22,6 @@ class UserWechat < ActiveRecord::Base
     Comment.where(author_id: old_user).update_all(author_id: u.id)
     Message.where(author_id: old_user).update_all(author_id: u.id)
     BlogComment.where(author_id: old_user).update_all(author_id: u.id)
+    UserActivity.where(user_id: old_user).update_all(user_id: u.id)
   end
 end