diff --git a/migrations/201606210001_devices_udid_idx_down.sql b/migrations/201606210001_devices_udid_idx_down.sql
new file mode 100644
index 00000000..8fb7c277
--- /dev/null
+++ b/migrations/201606210001_devices_udid_idx_down.sql
@@ -0,0 +1 @@
+DROP INDEX udid_idx;
diff --git a/migrations/201606210001_devices_udid_idx_up.sql b/migrations/201606210001_devices_udid_idx_up.sql
new file mode 100644
index 00000000..db237b64
--- /dev/null
+++ b/migrations/201606210001_devices_udid_idx_up.sql
@@ -0,0 +1 @@
+CREATE UNIQUE INDEX IF NOT EXISTS udid_idx ON devices (udid);