diff --git a/app/core/config.py b/app/core/config.py
index bd8133b8..836cb54e 100644
--- a/app/core/config.py
+++ b/app/core/config.py
@@ -255,8 +255,8 @@ class ConfigModel(BaseModel):
     )
     # 启用分词搜索
     TOKENIZED_SEARCH: bool = False
-    # 为指定默认字幕添加.default后缀,默认不启用
-    DEFAULT_SUB: Optional[str] = None
+    # 为指定默认字幕添加.default后缀
+    DEFAULT_SUB: Optional[str] = "zh-cn"
 
 
 class Settings(BaseSettings, ConfigModel, LogConfigModel):
diff --git a/version.py b/version.py
index 2488b068..bbddf68a 100644
--- a/version.py
+++ b/version.py
@@ -1,2 +1,2 @@
-APP_VERSION = 'v2.2.9'
-FRONTEND_VERSION = 'v2.2.9'
+APP_VERSION = 'v2.3.0'
+FRONTEND_VERSION = 'v2.3.0'