diff --git a/app/services/courses_service.rb b/app/services/courses_service.rb
index 2cfbc550b..1ec8a0ef0 100644
--- a/app/services/courses_service.rb
+++ b/app/services/courses_service.rb
@@ -1,3 +1,4 @@
+#coding=utf-8
 class CoursesService
   include ApplicationHelper
   include CoursesHelper