diff --git a/README.md b/README.md
index 53d672e..f2c1e27 100644
--- a/README.md
+++ b/README.md
@@ -223,6 +223,17 @@ can make the following steps:
 
 Note that these actions is safe, also you can do that to reset your migrations if your migration files is too many.
 
+## Use `aerich` in application
+
+You can use `aerich` out of cli by use `Command` class.
+
+```python
+from aerich import Command
+
+command = Command(tortoise_config=config, app='models')
+await command.migrate('test')
+```
+
 ## License
 
 This project is licensed under the
diff --git a/aerich/__init__.py b/aerich/__init__.py
index 31fe76f..ef44daf 100644
--- a/aerich/__init__.py
+++ b/aerich/__init__.py
@@ -117,7 +117,7 @@ class Command:
         inspect = InspectDb(connection, tables)
         await inspect.inspect()
 
-    async def migrate(self, name: str):
+    async def migrate(self, name: str = "update"):
         return await Migrate.migrate(name)
 
     async def init_db(self, safe: bool):