diff --git a/db/migrate/20161001122012_add_tracker_id_index_to_workflows.rb b/db/migrate/20161001122012_add_tracker_id_index_to_workflows.rb
new file mode 100644
index 0000000..10c4dd9
--- /dev/null
+++ b/db/migrate/20161001122012_add_tracker_id_index_to_workflows.rb
@@ -0,0 +1,9 @@
+class AddTrackerIdIndexToWorkflows < ActiveRecord::Migration
+  def self.up
+    add_index :workflows, :tracker_id
+  end
+
+  def self.down
+    remove_index :workflows, :tracker_id
+  end
+end