diff --git a/initialize/migrate/database/02118_traffic_log_idx.down.sql b/initialize/migrate/database/02118_traffic_log_idx.down.sql
new file mode 100644
index 0000000..25598dd
--- /dev/null
+++ b/initialize/migrate/database/02118_traffic_log_idx.down.sql
@@ -0,0 +1 @@
+ALTER TABLE traffic_log DROP INDEX idx_timestamp;
diff --git a/initialize/migrate/database/02118_traffic_log_idx.up.sql b/initialize/migrate/database/02118_traffic_log_idx.up.sql
new file mode 100644
index 0000000..cdd308f
--- /dev/null
+++ b/initialize/migrate/database/02118_traffic_log_idx.up.sql
@@ -0,0 +1 @@
+ALTER TABLE traffic_log ADD INDEX idx_timestamp (timestamp);