diff --git a/xiaomusic/utils.py b/xiaomusic/utils.py
index 3df7123..5f032fa 100644
--- a/xiaomusic/utils.py
+++ b/xiaomusic/utils.py
@@ -593,7 +593,7 @@ def _to_utf8(v):
             return ts
         return old_ts
     elif isinstance(v, list):
-        return "".join(v)
+        return "".join(str(item) for item in v)
     return str(v)