diff --git a/egs/librispeech/ASR/.conv_feat_vis.py.swp b/egs/librispeech/ASR/.conv_feat_vis.py.swp
index cf2b27318..ca87e40a8 100644
Binary files a/egs/librispeech/ASR/.conv_feat_vis.py.swp and b/egs/librispeech/ASR/.conv_feat_vis.py.swp differ
diff --git a/egs/librispeech/ASR/conv_feat_vis.py b/egs/librispeech/ASR/conv_feat_vis.py
index 2d135ab0f..ea0f0b4d8 100644
--- a/egs/librispeech/ASR/conv_feat_vis.py
+++ b/egs/librispeech/ASR/conv_feat_vis.py
@@ -1,6 +1,7 @@
 from glob import glob
 import numpy as np
 import matplotlib.pyplot as plt
+from tqdm import tqdm
 
 spk_list = glob('./conv_feat/*')
 for spk in spk_list: