diff --git a/packages/application/cosyvoice_service.py b/packages/application/cosyvoice_service.py
index f797e3f5b..6b645f91c 100755
--- a/packages/application/cosyvoice_service.py
+++ b/packages/application/cosyvoice_service.py
@@ -569,7 +569,9 @@ class CosyVoiceService:
             清洗后的 prefix
         """
         # 只保留字母和数字
-        cleaned = "".join(c for c in name if c.isalnum())
+        import re
+
+        cleaned = re.sub(r"[^a-zA-Z0-9]", "", name)
         # 最多10字符
         cleaned = cleaned[:10]
         # 如果清洗后为空，用默认值