diff --git a/priv/repo/migrations/20210424200445_remove_useless_tables.exs b/priv/repo/migrations/20210424200445_remove_useless_tables.exs
new file mode 100644
index 0000000..c1e54a9
--- /dev/null
+++ b/priv/repo/migrations/20210424200445_remove_useless_tables.exs
@@ -0,0 +1,12 @@
+defmodule Runosaari.Repo.Migrations.RemoveUselessTables do
+  use Ecto.Migration
+
+  def change do
+    alter table("performances") do
+      remove :performer_id
+      remove :location_id
+    end
+    drop table("locations")
+    drop table("performer_performance")
+  end
+end