diff --git a/dictation_server/db/migrations/052-add-task-index.sql b/dictation_server/db/migrations/052-add-task-index.sql
new file mode 100644
index 0000000..459a54f
--- /dev/null
+++ b/dictation_server/db/migrations/052-add-task-index.sql
@@ -0,0 +1,5 @@
+-- +migrate Up
+ALTER TABLE `tasks` ADD INDEX `idx_account_id_and_audio_file_id` (account_id,audio_file_id);
+
+-- +migrate Down
+ALTER TABLE `tasks` DROP INDEX `idx_account_id_and_audio_file_id`;
\ No newline at end of file