diff --git a/egs/multi_zh-hans/ASR/zipformer/decode.py b/egs/multi_zh-hans/ASR/zipformer/decode.py
index 94a4c4a3c..f501c3c30 100755
--- a/egs/multi_zh-hans/ASR/zipformer/decode.py
+++ b/egs/multi_zh-hans/ASR/zipformer/decode.py
@@ -200,7 +200,7 @@ def get_parser():
     parser.add_argument(
         "--lang-dir",
         type=Path,
-        default="data/lang_bpe_500",
+        default="data/lang_bpe_2000",
         help="The lang dir containing word table and LG graph",
     )