diff --git a/db/migrate/20151019085603_update_attachments.rb b/db/migrate/20151019085603_update_attachments.rb
new file mode 100644
index 000000000..afb63a277
--- /dev/null
+++ b/db/migrate/20151019085603_update_attachments.rb
@@ -0,0 +1,23 @@
+class UpdateAttachments < ActiveRecord::Migration
+  def up
+    count = Attachment.all.count / 30 + 2
+    transaction do
+      for i in 1 ... count do i
+        Attachment.page(i).per(30).each do |attachment|
+          if attachment.container_type == 'Course'
+            course = attachment.course
+            if course
+              if course.is_public == 0
+                attachment.is_public = 0
+                attachment.save
+              end
+            end
+          end
+        end
+      end
+    end
+  end
+
+  def down
+  end
+end
diff --git a/db/schema.rb b/db/schema.rb
index 4a0d2312a..44548ad9c 100644
--- a/db/schema.rb
+++ b/db/schema.rb
@@ -11,7 +11,7 @@
 #
 # It's strongly recommended to check this file into your version control system.
 
-ActiveRecord::Schema.define(:version => 20151014023806) do
+ActiveRecord::Schema.define(:version => 20151019085603) do
 
   create_table "activities", :force => true do |t|
     t.integer  "act_id",                                  :null => false