diff --git a/xiaomusic/config.py b/xiaomusic/config.py
index 562e271..da8de4d 100644
--- a/xiaomusic/config.py
+++ b/xiaomusic/config.py
@@ -97,7 +97,7 @@ class Config:
     port: int = int(os.getenv("XIAOMUSIC_PORT", "8090"))  # 监听端口
     public_port: int = int(os.getenv("XIAOMUSIC_PUBLIC_PORT", 0))  # 歌曲访问端口
     proxy: str = os.getenv("XIAOMUSIC_PROXY", None)
-    loudnorm: str = os.getenv("XIAOMUSIC_LOUDNORM", None) # 均衡音量参数
+    loudnorm: str = os.getenv("XIAOMUSIC_LOUDNORM", None)  # 均衡音量参数
     search_prefix: str = os.getenv(
         "XIAOMUSIC_SEARCH", "bilisearch:"
     )  # "bilisearch:" or "ytsearch:"
diff --git a/xiaomusic/utils.py b/xiaomusic/utils.py
index a24e7ec..27ce8e4 100644
--- a/xiaomusic/utils.py
+++ b/xiaomusic/utils.py
@@ -901,7 +901,7 @@ async def download_playlist(config, url, dirname):
 
     if config.enable_yt_dlp_cookies:
         sbp_args += ("--cookies", f"{config.yt_dlp_cookies_path}")
-    
+
     if config.loudnorm:
         sbp_args += ("--postprocessor-args", f"-af {config.loudnorm}")
 
@@ -939,7 +939,7 @@ async def download_one_music(config, url, name=""):
 
     if config.enable_yt_dlp_cookies:
         sbp_args += ("--cookies", f"{config.yt_dlp_cookies_path}")
-    
+
     if config.loudnorm:
         sbp_args += ("--postprocessor-args", f"-af {config.loudnorm}")
 
diff --git a/xiaomusic/xiaomusic.py b/xiaomusic/xiaomusic.py
index d09a4c5..19afdf5 100644
--- a/xiaomusic/xiaomusic.py
+++ b/xiaomusic/xiaomusic.py
@@ -1724,7 +1724,7 @@ class XiaoMusicDevice:
 
         if self.config.enable_yt_dlp_cookies:
             sbp_args += ("--cookies", f"{self.config.yt_dlp_cookies_path}")
-    
+
         if self.config.loudnorm:
             sbp_args += ("--postprocessor-args", f"-af {self.config.loudnorm}")