diff --git a/updater/sis-updater-worker/src/db/migrations/20240919_00_add_index_to_enrollments.js b/updater/sis-updater-worker/src/db/migrations/20240919_00_add_index_to_enrollments.js
new file mode 100644
index 0000000000..06d4159b3e
--- /dev/null
+++ b/updater/sis-updater-worker/src/db/migrations/20240919_00_add_index_to_enrollments.js
@@ -0,0 +1,8 @@
+module.exports = {
+  up: async queryInterface => {
+    await queryInterface.addIndex('enrollment', ['course_id'])
+  },
+  down: async queryInterface => {
+    await queryInterface.removeIndex('enrollment', ['course_id'])
+  },
+}