diff --git a/db/migrate/011_create_links.rb b/db/migrate/012_create_links.rb
similarity index 100%
rename from db/migrate/011_create_links.rb
rename to db/migrate/012_create_links.rb
diff --git a/db/migrate/013_create_links.rb b/db/migrate/013_create_links.rb
new file mode 100644
index 0000000..87b97cb
--- /dev/null
+++ b/db/migrate/013_create_links.rb
@@ -0,0 +1,14 @@
+class CreateLinks < ActiveRecord::Migration
+  def self.up
+    create_table :links do |t|
+      t.integer :from_page_id
+      t.integer :to_page_id
+
+      t.timestamps
+    end
+  end
+
+  def self.down
+    drop_table :links
+  end
+end
diff --git a/db/migrate/013_add_can_attach_to_pages.rb b/db/migrate/014_add_can_attach_to_pages.rb
similarity index 100%
rename from db/migrate/013_add_can_attach_to_pages.rb
rename to db/migrate/014_add_can_attach_to_pages.rb
diff --git a/db/migrate/014_add_locking_to_pages.rb b/db/migrate/015_add_locking_to_pages.rb
similarity index 100%
rename from db/migrate/014_add_locking_to_pages.rb
rename to db/migrate/015_add_locking_to_pages.rb
diff --git a/db/migrate/015_page_site_fk.rb b/db/migrate/015_page_site_fk.rb
new file mode 100644
index 0000000..5e850a1
--- /dev/null
+++ b/db/migrate/015_page_site_fk.rb
@@ -0,0 +1,12 @@
+class PageSiteFk < ActiveRecord::Migration
+  def self.up
+    add_column :pages, :site_id, :integer
+    add_column :page_versions, :site_id, :integer
+    Page.update_all 'site_id=1'
+  end
+
+  def self.down
+    remove_column :pages, :site_id
+    remove_column :page_versions, :site_id
+  end
+end
diff --git a/db/migrate/016_add_locking_to_pages.rb b/db/migrate/016_add_locking_to_pages.rb
new file mode 100644
index 0000000..6386ad0
--- /dev/null
+++ b/db/migrate/016_add_locking_to_pages.rb
@@ -0,0 +1,9 @@
+class AddLockingToPages < ActiveRecord::Migration
+  def self.up
+    add_column :pages, :locked_at, :datetime 
+  end
+
+  def self.down
+    remove_column :pages, :locked_at
+  end
+end