diff --git a/src/lbc/mixin/__init__.py b/src/lbc/mixin/__init__.py
index 9349ffe..24e5ad7 100644
--- a/src/lbc/mixin/__init__.py
+++ b/src/lbc/mixin/__init__.py
@@ -3,9 +3,4 @@ from .search import SearchMixin
 from .user import UserMixin
 from .ad import AdMixin
 
-__all__ = [
-    "SessionMixin",
-    "SearchMixin",
-    "UserMixin",
-    "AdMixin"
-]
\ No newline at end of file
+__all__ = ["SessionMixin", "SearchMixin", "UserMixin", "AdMixin"]
diff --git a/src/lbc/model/city.py b/src/lbc/model/city.py
index 7f63b2e..e636fbd 100644
--- a/src/lbc/model/city.py
+++ b/src/lbc/model/city.py
@@ -1,5 +1,6 @@
 from dataclasses import dataclass
 
+
 @dataclass
 class City:
     lat: float
diff --git a/src/lbc/model/proxy.py b/src/lbc/model/proxy.py
index adfd0a6..7b3fc57 100644
--- a/src/lbc/model/proxy.py
+++ b/src/lbc/model/proxy.py
@@ -1,5 +1,6 @@
 from dataclasses import dataclass
 
+
 @dataclass
 class Proxy:
     host: str
diff --git a/src/lbc/model/user.py b/src/lbc/model/user.py
index 5ad071a..28535ee 100644
--- a/src/lbc/model/user.py
+++ b/src/lbc/model/user.py
@@ -1,5 +1,6 @@
 from dataclasses import dataclass
 
+
 @dataclass
 class Reply:
     in_minutes: int
diff --git a/utils/generate_enum_categories.py b/utils/generate_enum_categories.py
index d06976a..96059c1 100644
--- a/utils/generate_enum_categories.py
+++ b/utils/generate_enum_categories.py
@@ -1,5 +1,6 @@
 import lbc
 
+
 def transform_str(string: str) -> str:
     return (
         string.strip()