diff --git a/initialize/migrate/database/02118_traffic_log_idx.up.sql b/initialize/migrate/database/02118_traffic_log_idx.up.sql
index 7928a61..757f18e 100644
--- a/initialize/migrate/database/02118_traffic_log_idx.up.sql
+++ b/initialize/migrate/database/02118_traffic_log_idx.up.sql
@@ -1,2 +1,2 @@
-ALTER TABLE traffic_log ADD INDEX IF NOT EXISTS idx_timestamp (timestamp);
+CREATE INDEX IF NOT EXISTS idx_timestamp ON traffic_log (timestamp);