diff --git a/bat_detect/utils/audio_utils.py b/bat_detect/utils/audio_utils.py
index bcb262e..ba12798 100644
--- a/bat_detect/utils/audio_utils.py
+++ b/bat_detect/utils/audio_utils.py
@@ -2,6 +2,7 @@ import warnings
 from typing import Optional, Tuple
 
 import librosa
+import librosa.core.spectrum
 import numpy as np
 import torch