diff --git a/egs/librispeech/ASR/.conv_feat_vis.py.swp b/egs/librispeech/ASR/.conv_feat_vis.py.swp
index e8badd03d..e6672bf05 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 c494ff07d..e05dd9ac2 100644
--- a/egs/librispeech/ASR/conv_feat_vis.py
+++ b/egs/librispeech/ASR/conv_feat_vis.py
@@ -16,6 +16,6 @@ feats_all = feats_all.transpose(1,0)
 print(feats_all.shape)
 
 for i in range(512):
-    plt.hist(feats_all[i])
+    plt.hist(feats_all[i], bins=500)
     plt.savefig(f'./conv_feat/dim_{i}.pdf')
     plt.close()