diff --git a/migrations/102_parent_sites_index.rb b/migrations/102_parent_sites_index.rb
new file mode 100644
index 00000000..80045de7
--- /dev/null
+++ b/migrations/102_parent_sites_index.rb
@@ -0,0 +1,9 @@
+Sequel.migration do
+  up {
+    DB.add_index :sites, :parent_site_id
+  }
+
+  down {
+    DB.drop_index :sites, :parent_site_id
+  }
+end