diff --git a/database/2018_10_19_071439_add_topics_track_index.php b/database/2018_10_19_071439_add_topics_track_index.php
new file mode 100644
index 00000000..7e70fddd
--- /dev/null
+++ b/database/2018_10_19_071439_add_topics_track_index.php
@@ -0,0 +1,41 @@
+<?php
+namespace Misuzu\DatabaseMigrations\AddTopicsTrackIndex;
+
+use PDO;
+
+function migrate_up(PDO $conn): void
+{
+    $conn->exec('
+        ALTER TABLE `msz_forum_topics_track`
+            ADD INDEX `forum_track_last_read` (`track_last_read`);
+    ');
+
+    // i am actually brain dead, holy shit
+    $conn->exec('
+        ALTER TABLE `msz_forum_permissions`
+            DROP INDEX `forum_permissions_forum_id_unique`,
+            ADD UNIQUE INDEX `forum_permissions_unique` (`user_id`, `role_id`, `forum_id`),
+            DROP INDEX `forum_permissions_user_id_unique`,
+            ADD INDEX `forum_permissions_forum_id` (`forum_id`),
+            DROP INDEX `forum_permissions_role_id_unique`,
+            ADD INDEX `forum_permissions_role_id` (`role_id`);
+    ');
+}
+
+function migrate_down(PDO $conn): void
+{
+    $conn->exec('
+        ALTER TABLE `msz_forum_permissions`
+            DROP INDEX `forum_permissions_unique`,
+            ADD UNIQUE INDEX `forum_permissions_user_id_unique` (`user_id`),
+            DROP INDEX `forum_permissions_forum_id`,
+            ADD INDEX `forum_permissions_role_id_unique` (`role_id`),
+            DROP INDEX `forum_permissions_role_id`,
+            ADD INDEX `forum_permissions_forum_id_unique` (`forum_id`);
+    ');
+
+    $conn->exec('
+        ALTER TABLE `msz_forum_topics_track`
+            DROP INDEX `forum_track_last_read`;
+    ');
+}