diff --git a/db/migrate/20190701022644_transfer_competition_personal_enroll_data.rb b/db/migrate/20190701022644_transfer_competition_personal_enroll_data.rb
index 4c59ad14..7122470c 100644
--- a/db/migrate/20190701022644_transfer_competition_personal_enroll_data.rb
+++ b/db/migrate/20190701022644_transfer_competition_personal_enroll_data.rb
@@ -1,3 +1,4 @@
+# encoding=utf-8
 class TransferCompetitionPersonalEnrollData < ActiveRecord::Migration
   CODES = %W(2 3 4 5 6 7 8 9 a b c f e f g h i j k l m n o p q r s t u v w x y z)
 
diff --git a/db/migrate/20190705071020_create_library_tags.rb b/db/migrate/20190705071020_create_library_tags.rb
index 62b94c01..b3e458eb 100644
--- a/db/migrate/20190705071020_create_library_tags.rb
+++ b/db/migrate/20190705071020_create_library_tags.rb
@@ -1,3 +1,4 @@
+# encoding=utf-8
 class CreateLibraryTags < ActiveRecord::Migration
   def change
     create_table :library_tags do |t|