diff --git a/app/models/node.py b/app/models/node.py
index 07b6504..c9fea9b 100644
--- a/app/models/node.py
+++ b/app/models/node.py
@@ -1,9 +1,9 @@
-from enum import Enum
+from enum import StrEnum, IntEnum
 
 from pydantic import ConfigDict, BaseModel, Field
 
 
-class BackendConfigFormat(Enum):
+class BackendConfigFormat(IntEnum):
     PLAIN = 0
     JSON = 1
     YAML = 2
@@ -25,13 +25,13 @@ class Backend(BaseModel):
     running: bool
 
 
-class NodeStatus(str, Enum):
+class NodeStatus(StrEnum):
     healthy = "healthy"
     unhealthy = "unhealthy"
     disabled = "disabled"
 
 
-class NodeConnectionBackend(str, Enum):
+class NodeConnectionBackend(StrEnum):
     grpcio = "grpcio"
     grpclib = "grpclib"
 
diff --git a/app/models/notification.py b/app/models/notification.py
index f5fc6f6..087e02d 100644
--- a/app/models/notification.py
+++ b/app/models/notification.py
@@ -1,5 +1,5 @@
 from datetime import datetime as dt
-from enum import Enum
+from enum import StrEnum
 from typing import Optional
 
 from pydantic import BaseModel
@@ -19,7 +19,7 @@ class AdminNotif(Notification):
 class UserNotification(Notification):
     user: UserResponse
 
-    class Action(str, Enum):
+    class Action(StrEnum):
         user_created = "user_created"
         user_updated = "user_updated"
         user_activated = "user_activated"
diff --git a/app/models/proxy.py b/app/models/proxy.py
index 0873176..266f42b 100644
--- a/app/models/proxy.py
+++ b/app/models/proxy.py
@@ -1,11 +1,11 @@
-from enum import Enum
+from enum import StrEnum, Enum
 
 from pydantic import ConfigDict, BaseModel, Field, field_validator
 
 from app.models.node import Node
 
 
-class ProxyTypes(str, Enum):
+class ProxyTypes(StrEnum):
     # proxy_type = protocol
     VMess = "vmess"
     VLESS = "vless"
@@ -18,7 +18,7 @@ class ProxyTypes(str, Enum):
     ShadowTLS = "shadowtls"
 
 
-class InboundHostSecurity(str, Enum):
+class InboundHostSecurity(StrEnum):
     inbound_default = "inbound_default"
     none = "none"
     tls = "tls"
diff --git a/app/models/settings.py b/app/models/settings.py
index 4cb7c1f..0032ef7 100644
--- a/app/models/settings.py
+++ b/app/models/settings.py
@@ -1,10 +1,10 @@
-from enum import Enum
+from enum import StrEnum
 from typing import Pattern
 
 from pydantic import BaseModel
 
 
-class ConfigTypes(str, Enum):
+class ConfigTypes(StrEnum):
     links = "links"
     base64_links = "base64-links"
     xray = "xray"
diff --git a/app/models/user.py b/app/models/user.py
index 34938c1..cc095c8 100644
--- a/app/models/user.py
+++ b/app/models/user.py
@@ -1,6 +1,6 @@
 import secrets
 from datetime import datetime
-from enum import Enum
+from enum import StrEnum
 from typing import Annotated
 
 from pydantic import (
@@ -14,12 +14,12 @@ from pydantic import (
 USERNAME_REGEXP = r"^\w{3,32}$"
 
 
-class UserStatus(str, Enum):
+class UserStatus(StrEnum):
     ACTIVE = "active"
     INACTIVE = "inactive"
 
 
-class UserDataUsageResetStrategy(str, Enum):
+class UserDataUsageResetStrategy(StrEnum):
     no_reset = "no_reset"
     day = "day"
     week = "week"
@@ -27,7 +27,7 @@ class UserDataUsageResetStrategy(str, Enum):
     year = "year"
 
 
-class UserExpireStrategy(str, Enum):
+class UserExpireStrategy(StrEnum):
     NEVER = "never"
     FIXED_DATE = "fixed_date"
     START_ON_FIRST_USE = "start_on_first_use"
diff --git a/app/routes/user.py b/app/routes/user.py
index 6b88441..8b5a6ba 100644
--- a/app/routes/user.py
+++ b/app/routes/user.py
@@ -1,7 +1,7 @@
 import asyncio
 import logging
 from datetime import datetime, timedelta
-from enum import Enum
+from enum import StrEnum
 
 import sqlalchemy
 from fastapi import APIRouter
@@ -35,7 +35,7 @@ logger = logging.getLogger(__name__)
 router = APIRouter(prefix="/users", tags=["User"])
 
 
-class UsersSortingOptions(str, Enum):
+class UsersSortingOptions(StrEnum):
     USERNAME = "username"
     USED_TRAFFIC = "used_traffic"
     DATA_LIMIT = "data_limit"
diff --git a/cli/subscription.py b/cli/subscription.py
index f8f03c6..d1734f7 100644
--- a/cli/subscription.py
+++ b/cli/subscription.py
@@ -1,5 +1,5 @@
 import typer
-from enum import Enum
+from enum import StrEnum
 from typing import Optional
 from rich.console import Console
 
@@ -13,7 +13,7 @@ app = typer.Typer(no_args_is_help=True)
 console = Console()
 
 
-class ConfigFormat(str, Enum):
+class ConfigFormat(StrEnum):
     v2ray = "v2ray"
     clash = "clash"