diff --git a/app/libs/limit_forbid_control/base.rb b/app/libs/limit_forbid_control/base.rb
index 26977b314..6f11ae5eb 100644
--- a/app/libs/limit_forbid_control/base.rb
+++ b/app/libs/limit_forbid_control/base.rb
@@ -45,7 +45,7 @@ class LimitForbidControl::Base
   end
 
   def remain_times
-    allow_times - error_times
+    allow_times.to_i - error_times
   end
 
   def clear