diff --git a/sea-orm-migration/src/cli.rs b/sea-orm-migration/src/cli.rs
index c5e15771..111c1a5e 100644
--- a/sea-orm-migration/src/cli.rs
+++ b/sea-orm-migration/src/cli.rs
@@ -1,4 +1,4 @@
-use clap::{App, Arg, AppSettings};
+use clap::{App, AppSettings, Arg};
 use dotenv::dotenv;
 use std::{fmt::Display, process::exit};
 use tracing_subscriber::{prelude::*, EnvFilter};
diff --git a/sea-orm-migration/src/lib.rs b/sea-orm-migration/src/lib.rs
index a77f6d2f..ab4f8eb3 100644
--- a/sea-orm-migration/src/lib.rs
+++ b/sea-orm-migration/src/lib.rs
@@ -24,5 +24,7 @@ pub trait MigrationTrait: MigrationName + Send + Sync {
     async fn up(&self, manager: &SchemaManager) -> Result<(), DbErr>;
 
     /// Define actions to perform when rolling back the migration
-    async fn down(&self, manager: &SchemaManager) -> Result<(), DbErr>;
+    async fn down(&self, manager: &SchemaManager) -> Result<(), DbErr> {
+        Ok(())
+    }
 }
diff --git a/sea-orm-migration/src/manager.rs b/sea-orm-migration/src/manager.rs
index e6d618b0..71e91b37 100644
--- a/sea-orm-migration/src/manager.rs
+++ b/sea-orm-migration/src/manager.rs
@@ -1,8 +1,8 @@
 use sea_orm::sea_query::{
     extension::postgres::{TypeAlterStatement, TypeCreateStatement, TypeDropStatement},
-    ForeignKeyCreateStatement, ForeignKeyDropStatement, IndexCreateStatement,
-    IndexDropStatement, TableAlterStatement, TableCreateStatement, TableDropStatement,
-    TableRenameStatement, TableTruncateStatement,
+    ForeignKeyCreateStatement, ForeignKeyDropStatement, IndexCreateStatement, IndexDropStatement,
+    TableAlterStatement, TableCreateStatement, TableDropStatement, TableRenameStatement,
+    TableTruncateStatement,
 };
 use sea_orm::{ConnectionTrait, DbBackend, DbConn, DbErr, StatementBuilder};
 use sea_schema::{mysql::MySql, postgres::Postgres, probe::SchemaProbe, sqlite::Sqlite};