diff --git a/lib/use_case/question/create.rb b/lib/use_case/question/create.rb
index a0a55450..abe57516 100644
--- a/lib/use_case/question/create.rb
+++ b/lib/use_case/question/create.rb
@@ -30,7 +30,7 @@ module UseCase
 
         inbox = ::Inbox.create!(user: target_user, question: question, new: true)
 
-        webpush_app = Rpush::App.find_by(name: "webpush")
+        webpush_app = ::Rpush::App.find_by(name: "webpush")
         target_user.push_notification(webpush_app, inbox)
 
         {