diff --git a/paddlespeech/audio/transform/perturb.py b/paddlespeech/audio/transform/perturb.py
index 0825caec..78b8d2c3 100644
--- a/paddlespeech/audio/transform/perturb.py
+++ b/paddlespeech/audio/transform/perturb.py
@@ -14,6 +14,7 @@
 # Modified from espnet(https://github.com/espnet/espnet)
 import io
 import os
+import sys
 
 import h5py
 import librosa
diff --git a/paddlespeech/s2t/io/reader.py b/paddlespeech/s2t/io/reader.py
index 5e018bef..be643cc7 100644
--- a/paddlespeech/s2t/io/reader.py
+++ b/paddlespeech/s2t/io/reader.py
@@ -14,9 +14,12 @@
 # Modified from espnet(https://github.com/espnet/espnet)
 from collections import OrderedDict
 
+import io
+import os
 import kaldiio
 import numpy as np
 import soundfile
+import h5py
 
 from .utility import feat_type
 from paddlespeech.audio.transform.transformation import Transformation