diff --git a/Gemfile b/Gemfile
index 5e4be042..ce827d25 100644
--- a/Gemfile
+++ b/Gemfile
@@ -15,6 +15,8 @@ unless RUBY_PLATFORM =~ /w32/
     gem 'rqrcode_png'
     gem 'roo-xls'
     gem 'newrelic_rpm'
+    gem 'seventeen_mon'
+    gem 'mobinfo'
   end
   gem 'certified'
   gem 'net-ssh', '2.9.1'
@@ -22,8 +24,6 @@ unless RUBY_PLATFORM =~ /w32/
   gem 'nokogiri'
 end
 
-gem 'seventeen_mon'
-gem 'mobinfo'
 gem 'simple_xlsx_reader'
 gem 'wechat',path: 'lib/wechat'
 gem 'grack', path:'lib/grack'
diff --git a/db/migrate/20190301112631_migrate_exer_user_score.rb b/db/migrate/20190301112631_migrate_exer_user_score.rb
index d334373c..dd075562 100644
--- a/db/migrate/20190301112631_migrate_exer_user_score.rb
+++ b/db/migrate/20190301112631_migrate_exer_user_score.rb
@@ -1,3 +1,4 @@
+#encoding: utf-8
 class MigrateExerUserScore < ActiveRecord::Migration
   def up
     exercise = Exercise.where(:id => 1264).first
diff --git a/db/migrate/20190304021422_department_default_host_count.rb b/db/migrate/20190304021422_department_default_host_count.rb
new file mode 100644
index 00000000..f13f540b
--- /dev/null
+++ b/db/migrate/20190304021422_department_default_host_count.rb
@@ -0,0 +1,10 @@
+class DepartmentDefaultHostCount < ActiveRecord::Migration
+  def up
+    change_column :departments, :host_count, :integer, :default => 5
+
+    Department.update_all(:host_count => 5)
+  end
+
+  def down
+  end
+end