diff --git a/CHANGELOG.md b/CHANGELOG.md
index 28b7097..5141838 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,6 +2,10 @@
 
 ## 0.3
 
+### 0.3.3
+
+- Support multiple databases. (#68)
+
 ### 0.3.2
 
 - Fix migrate to new database error. (#62)
diff --git a/README.md b/README.md
index 92d52f3..cd8c6e1 100644
--- a/README.md
+++ b/README.md
@@ -161,10 +161,24 @@ Now your db rollback to specified version.
 1_202029051520102929_drop_column.json
 ```
 
-## Support this project
+### Multiple databases
 
-- Just give a star!
-- Donation.
+```python
+tortoise_orm = {
+    "connections": {
+        "default": expand_db_url(db_url, True),
+        "second": expand_db_url(db_url_second, True),
+    },
+    "apps": {
+        "models": {"models": ["tests.models", "aerich.models"], "default_connection": "default"},
+        "models_second": {"models": ["tests.models_second"], "default_connection": "second",},
+    },
+}
+```
+
+You need only specify `aerich.models` in one app, and must specify `--app` when run `aerich migrate` and so on.
+
+## Support this project
 
 | AliPay                                                                                 | WeChatPay                                                                                 | PayPal                                                           |
 | -------------------------------------------------------------------------------------- | ----------------------------------------------------------------------------------------- | ---------------------------------------------------------------- |
diff --git a/aerich/__init__.py b/aerich/__init__.py
index f9aa3e1..e19434e 100644
--- a/aerich/__init__.py
+++ b/aerich/__init__.py
@@ -1 +1 @@
-__version__ = "0.3.2"
+__version__ = "0.3.3"
diff --git a/aerich/cli.py b/aerich/cli.py
index 1daf670..eb14768 100644
--- a/aerich/cli.py
+++ b/aerich/cli.py
@@ -66,8 +66,6 @@ async def cli(ctx: Context, config, app, name):
 
         tortoise_config = get_tortoise_config(ctx, tortoise_orm)
         app = app or list(tortoise_config.get("apps").keys())[0]
-        if "aerich.models" not in tortoise_config.get("apps").get(app).get("models"):
-            raise UsageError("Check your tortoise config and add aerich.models to it.", ctx=ctx)
         ctx.obj["config"] = tortoise_config
         ctx.obj["location"] = location
         ctx.obj["app"] = app
diff --git a/conftest.py b/conftest.py
index 89e2c01..5a0a224 100644
--- a/conftest.py
+++ b/conftest.py
@@ -13,10 +13,15 @@ from aerich.ddl.sqlite import SqliteDDL
 from aerich.migrate import Migrate
 
 db_url = os.getenv("TEST_DB", "sqlite://:memory:")
+db_url_second = os.getenv("TEST_DB_SECOND", "sqlite://:memory:")
 tortoise_orm = {
-    "connections": {"default": expand_db_url(db_url, True)},
+    "connections": {
+        "default": expand_db_url(db_url, True),
+        "second": expand_db_url(db_url_second, True),
+    },
     "apps": {
         "models": {"models": ["tests.models", "aerich.models"], "default_connection": "default"},
+        "models_second": {"models": ["tests.models_second"], "default_connection": "second"},
     },
 }
 
diff --git a/poetry.lock b/poetry.lock
index ce75780..732c7d9 100644
--- a/poetry.lock
+++ b/poetry.lock
@@ -144,7 +144,7 @@ description = "cryptography is a package which provides cryptographic recipes an
 name = "cryptography"
 optional = true
 python-versions = ">=2.7,!=3.0.*,!=3.1.*,!=3.2.*,!=3.3.*,!=3.4.*"
-version = "3.1.1"
+version = "3.2.1"
 
 [package.dependencies]
 cffi = ">=1.8,<1.11.3 || >1.11.3"
@@ -337,7 +337,7 @@ description = "Data validation and settings management using python 3.6 type hin
 name = "pydantic"
 optional = false
 python-versions = ">=3.6"
-version = "1.6.1"
+version = "1.7"
 
 [package.extras]
 dotenv = ["python-dotenv (>=0.10.4)"]
@@ -558,7 +558,7 @@ marker = "python_version < \"3.8\""
 name = "zipp"
 optional = false
 python-versions = ">=3.6"
-version = "3.3.2"
+version = "3.4.0"
 
 [package.extras]
 docs = ["sphinx", "jaraco.packaging (>=3.2)", "rst.linker (>=1.9)"]
@@ -569,6 +569,7 @@ dbdrivers = ["aiomysql", "asyncpg"]
 
 [metadata]
 content-hash = "43fe9c0036f4d55d38f82c263887d8a7d9a35a597e02036b70a631955ff73149"
+lock-version = "1.0"
 python-versions = "^3.7"
 
 [metadata.files]
@@ -675,31 +676,30 @@ click = [
 ]
 colorama = [
     {file = "colorama-0.4.4-py2.py3-none-any.whl", hash = "sha256:9f47eda37229f68eee03b24b9748937c7dc3868f906e8ba69fbcbdd3bc5dc3e2"},
-    {file = "colorama-0.4.4.tar.gz", hash = "sha256:5941b2b48a20143d2267e95b1c2a7603ce057ee39fd88e7329b0c292aa16869b"},
 ]
 cryptography = [
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+    {file = "cryptography-3.2.1.tar.gz", hash = "sha256:d3d5e10be0cf2a12214ddee45c6bd203dab435e3d83b4560c03066eda600bfe3"},
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@@ -722,7 +722,6 @@ importlib-metadata = [
     {file = "importlib_metadata-2.0.0.tar.gz", hash = "sha256:77a540690e24b0305878c37ffd421785a6f7e53c8b5720d211b211de8d0e95da"},
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 ]
 iso8601 = [
@@ -767,23 +766,28 @@ pycparser = [
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+    {file = "pydantic-1.7-cp38-cp38-win_amd64.whl", hash = "sha256:b6d70d28aef95cebd8761818b4dfeb6bdbb71a68c1f4beb8983f083c630d57ee"},
+    {file = "pydantic-1.7-cp39-cp39-macosx_10_9_x86_64.whl", hash = "sha256:d5a131a5be9eee7172b98c680dc26f2382e66071c4848eb310c3cce00aeee4df"},
+    {file = "pydantic-1.7-cp39-cp39-manylinux1_i686.whl", hash = "sha256:8bd368a22f6a8dce262f7672c2cf06460a6ab0486fbfa8f6482d325d34277075"},
+    {file = "pydantic-1.7-cp39-cp39-manylinux2014_i686.whl", hash = "sha256:8e30ee558b295ef12572d0a9a3a35a2d33115f280e051e0b816c4b2448f0cb63"},
+    {file = "pydantic-1.7-cp39-cp39-manylinux2014_x86_64.whl", hash = "sha256:a3087623f8aa1795ebc3a69eb94683772db0943a4adef1bf5e9553effaafea93"},
+    {file = "pydantic-1.7-cp39-cp39-win_amd64.whl", hash = "sha256:7feac9bd1078adf7ae705c8c092b3ea5ada05318b38fd5e708cfce9f167dbeb8"},
+    {file = "pydantic-1.7-py3-none-any.whl", hash = "sha256:e43b66bf115860e7ef10efb8dd07a831d57c38df1efe475789c34c55067fb7fd"},
+    {file = "pydantic-1.7.tar.gz", hash = "sha256:38ee226f71dfbb7b91bc3d8af9932bf18c7505e57f7ed442e8cb78ff35c006a7"},
 ]
 pyflakes = [
     {file = "pyflakes-2.2.0-py2.py3-none-any.whl", hash = "sha256:0d94e0e05a19e57a99444b6ddcf9a6eb2e5c68d3ca1e98e90707af8152c90a92"},
@@ -910,6 +914,6 @@ typing-extensions = [
     {file = "typing_extensions-3.7.4.3.tar.gz", hash = "sha256:99d4073b617d30288f569d3f13d2bd7548c3a7e4c8de87db09a9d29bb3a4a60c"},
 ]
 zipp = [
-    {file = "zipp-3.3.2-py3-none-any.whl", hash = "sha256:50a4ef266c31c9409627b46012e206382eb8d23f46fbd358065a8335cfbf7d8f"},
-    {file = "zipp-3.3.2.tar.gz", hash = "sha256:adf8f2ed8f614ced567d849cae9d183cef6cfd27c77a5cae7a28029be0c2b7a7"},
+    {file = "zipp-3.4.0-py3-none-any.whl", hash = "sha256:102c24ef8f171fd729d46599845e95c7ab894a4cf45f5de11a44cc7444fb1108"},
+    {file = "zipp-3.4.0.tar.gz", hash = "sha256:ed5eee1974372595f9e416cc7bbeeb12335201d8081ca8a0743c954d4446e5cb"},
 ]
diff --git a/pyproject.toml b/pyproject.toml
index 1407d00..5e7e43a 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,6 +1,6 @@
 [tool.poetry]
 name = "aerich"
-version = "0.3.2"
+version = "0.3.3"
 description = "A database migrations tool for Tortoise ORM."
 authors = ["long2ice <long2ice@gmail.com>"]
 license = "Apache-2.0"
diff --git a/tests/models_second.py b/tests/models_second.py
new file mode 100644
index 0000000..c9426ae
--- /dev/null
+++ b/tests/models_second.py
@@ -0,0 +1,63 @@
+import datetime
+from enum import IntEnum
+
+from tortoise import Model, fields
+
+
+class ProductType(IntEnum):
+    article = 1
+    page = 2
+
+
+class PermissionAction(IntEnum):
+    create = 1
+    delete = 2
+    update = 3
+    read = 4
+
+
+class Status(IntEnum):
+    on = 1
+    off = 0
+
+
+class User(Model):
+    username = fields.CharField(max_length=20, unique=True)
+    password = fields.CharField(max_length=200)
+    last_login = fields.DatetimeField(description="Last Login", default=datetime.datetime.now)
+    is_active = fields.BooleanField(default=True, description="Is Active")
+    is_superuser = fields.BooleanField(default=False, description="Is SuperUser")
+    avatar = fields.CharField(max_length=200, default="")
+    intro = fields.TextField(default="")
+
+
+class Email(Model):
+    email = fields.CharField(max_length=200)
+    is_primary = fields.BooleanField(default=False)
+    user = fields.ForeignKeyField("models_second.User", db_constraint=False)
+
+
+class Category(Model):
+    slug = fields.CharField(max_length=200)
+    name = fields.CharField(max_length=200)
+    user = fields.ForeignKeyField("models_second.User", description="User")
+    created_at = fields.DatetimeField(auto_now_add=True)
+
+
+class Product(Model):
+    categories = fields.ManyToManyField("models_second.Category")
+    name = fields.CharField(max_length=50)
+    view_num = fields.IntField(description="View Num")
+    sort = fields.IntField()
+    is_reviewed = fields.BooleanField(description="Is Reviewed")
+    type = fields.IntEnumField(ProductType, description="Product Type")
+    image = fields.CharField(max_length=200)
+    body = fields.TextField()
+    created_at = fields.DatetimeField(auto_now_add=True)
+
+
+class Config(Model):
+    label = fields.CharField(max_length=200)
+    key = fields.CharField(max_length=20)
+    value = fields.JSONField()
+    status: Status = fields.IntEnumField(Status, default=Status.on)