diff --git a/dataset_toolkits/download.py b/dataset_toolkits/download.py
index 36e684ff..8040bd40 100644
--- a/dataset_toolkits/download.py
+++ b/dataset_toolkits/download.py
@@ -27,7 +27,10 @@
     # get file list
     if not os.path.exists(os.path.join(opt.output_dir, 'metadata.csv')):
         raise ValueError('metadata.csv not found')
-    metadata = pd.read_csv(os.path.join(opt.output_dir, 'metadata.csv'))
+
+    with open(os.path.join(opt.output_dir, 'metadata.csv'), 'r', encoding='utf-8', errors='ignore') as f:
+        metadata = pd.read_csv(f)
+
     if opt.instances is None:
         if opt.filter_low_aesthetic_score is not None:
             metadata = metadata[metadata['aesthetic_score'] >= opt.filter_low_aesthetic_score]
@@ -49,4 +52,5 @@
 
     # process objects
     downloaded = dataset_utils.download(metadata, **opt)
-    downloaded.to_csv(os.path.join(opt.output_dir, f'downloaded_{opt.rank}.csv'), index=False)
+    with open(os.path.join(opt.output_dir, f'downloaded_{opt.rank}.csv'), 'w', encoding='utf-8', errors='ignore') as f:
+        downloaded.to_csv(f, index=False)
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