diff --git a/migrations/000.181.sql b/migrations/000.181.sql
new file mode 100644
index 0000000..b080c7e
--- /dev/null
+++ b/migrations/000.181.sql
@@ -0,0 +1,3 @@
+-- P5-5137: add index on inquiries inserted
+
+CREATE INDEX inquiries_inserted_index ON inquiries (inserted);