diff --git a/src/quota/cluster_quota_limiter.py b/src/quota/cluster_quota_limiter.py
index 805791b9d..d2170f853 100644
--- a/src/quota/cluster_quota_limiter.py
+++ b/src/quota/cluster_quota_limiter.py
@@ -1,7 +1,7 @@
 """Simple cluster quota limiter where quota is fixed for the whole cluster."""
 
-from models.config import QuotaHandlersConfiguration
 from log import get_logger
+from models.config import QuotaHandlersConfiguration
 from quota.revokable_quota_limiter import RevokableQuotaLimiter
 
 logger = get_logger(__name__)
diff --git a/src/quota/connect_pg.py b/src/quota/connect_pg.py
index fbbf95109..e4ba2c9bf 100644
--- a/src/quota/connect_pg.py
+++ b/src/quota/connect_pg.py
@@ -1,6 +1,7 @@
 """PostgreSQL connection handler."""
 
 from typing import Any
+
 import psycopg2
 
 from log import get_logger
diff --git a/src/quota/quota_limiter.py b/src/quota/quota_limiter.py
index bc0d659f8..14543c590 100644
--- a/src/quota/quota_limiter.py
+++ b/src/quota/quota_limiter.py
@@ -30,16 +30,15 @@
 - reset quota to 10,000,000 tokens each month
 """
 
+import datetime
+import sqlite3
 from abc import ABC, abstractmethod
-
 from typing import Optional
 
-import datetime
-import sqlite3
 import psycopg2
 
 from log import get_logger
-from models.config import SQLiteDatabaseConfiguration, PostgreSQLDatabaseConfiguration
+from models.config import PostgreSQLDatabaseConfiguration, SQLiteDatabaseConfiguration
 from quota.connect_pg import connect_pg
 from quota.connect_sqlite import connect_sqlite
 
diff --git a/src/quota/quota_limiter_factory.py b/src/quota/quota_limiter_factory.py
index 9b8105c4d..3067f7493 100644
--- a/src/quota/quota_limiter_factory.py
+++ b/src/quota/quota_limiter_factory.py
@@ -1,12 +1,11 @@
 """Quota limiter factory class."""
 
-from log import get_logger
 import constants
+from log import get_logger
 from models.config import QuotaHandlersConfiguration
-
-from quota.user_quota_limiter import UserQuotaLimiter
 from quota.cluster_quota_limiter import ClusterQuotaLimiter
 from quota.quota_limiter import QuotaLimiter
+from quota.user_quota_limiter import UserQuotaLimiter
 
 logger = get_logger(__name__)
 
diff --git a/src/quota/revokable_quota_limiter.py b/src/quota/revokable_quota_limiter.py
index 6a7819abe..9f5ff54cb 100644
--- a/src/quota/revokable_quota_limiter.py
+++ b/src/quota/revokable_quota_limiter.py
@@ -1,24 +1,24 @@
 """Simple quota limiter where quota can be revoked."""
 
-from datetime import datetime, UTC
+from datetime import UTC, datetime
 
-from models.config import QuotaHandlersConfiguration
 from log import get_logger
-from utils.connection_decorator import connection
+from models.config import QuotaHandlersConfiguration
 from quota.quota_exceed_error import QuotaExceedError
 from quota.quota_limiter import QuotaLimiter
 from quota.sql import (
     CREATE_QUOTA_TABLE_PG,
     CREATE_QUOTA_TABLE_SQLITE,
-    UPDATE_AVAILABLE_QUOTA_PG,
-    UPDATE_AVAILABLE_QUOTA_SQLITE,
+    INIT_QUOTA_PG,
+    INIT_QUOTA_SQLITE,
     SELECT_QUOTA_PG,
     SELECT_QUOTA_SQLITE,
     SET_AVAILABLE_QUOTA_PG,
     SET_AVAILABLE_QUOTA_SQLITE,
-    INIT_QUOTA_PG,
-    INIT_QUOTA_SQLITE,
+    UPDATE_AVAILABLE_QUOTA_PG,
+    UPDATE_AVAILABLE_QUOTA_SQLITE,
 )
+from utils.connection_decorator import connection
 
 logger = get_logger(__name__)
 
diff --git a/src/quota/token_usage_history.py b/src/quota/token_usage_history.py
index c0fccc7a9..3ea14a452 100644
--- a/src/quota/token_usage_history.py
+++ b/src/quota/token_usage_history.py
@@ -6,25 +6,23 @@
 """
 
 import sqlite3
-from datetime import datetime, UTC
+from datetime import UTC, datetime
 from typing import Any, Optional
 
 import psycopg2
 
 from log import get_logger
-
+from models.config import (
+    PostgreSQLDatabaseConfiguration,
+    QuotaHandlersConfiguration,
+    SQLiteDatabaseConfiguration,
+)
 from quota.connect_pg import connect_pg
 from quota.connect_sqlite import connect_sqlite
 from quota.sql import (
-    CREATE_TOKEN_USAGE_TABLE,
     CONSUME_TOKENS_FOR_USER_PG,
     CONSUME_TOKENS_FOR_USER_SQLITE,
-)
-
-from models.config import (
-    QuotaHandlersConfiguration,
-    SQLiteDatabaseConfiguration,
-    PostgreSQLDatabaseConfiguration,
+    CREATE_TOKEN_USAGE_TABLE,
 )
 from utils.connection_decorator import connection
 
diff --git a/src/quota/user_quota_limiter.py b/src/quota/user_quota_limiter.py
index 13901fd05..eee9dd7c2 100644
--- a/src/quota/user_quota_limiter.py
+++ b/src/quota/user_quota_limiter.py
@@ -1,7 +1,7 @@
 """Simple user quota limiter where each user has a fixed quota."""
 
-from models.config import QuotaHandlersConfiguration
 from log import get_logger
+from models.config import QuotaHandlersConfiguration
 from quota.revokable_quota_limiter import RevokableQuotaLimiter
 
 logger = get_logger(__name__)