diff --git a/enhancer/utils/io.py b/enhancer/utils/io.py
index 80bd1a4..afc19e8 100644
--- a/enhancer/utils/io.py
+++ b/enhancer/utils/io.py
@@ -1,7 +1,6 @@
 import os
 import librosa
 from typing import Optional
-from matplotlib.pyplot import axis
 import numpy as np
 import torch
 import torchaudio