diff --git a/egs/librispeech/ASR/pruned_transducer_stateless/beam_search.py b/egs/librispeech/ASR/pruned_transducer_stateless/beam_search.py
index 1a2aa487e..5815fefa5 100644
--- a/egs/librispeech/ASR/pruned_transducer_stateless/beam_search.py
+++ b/egs/librispeech/ASR/pruned_transducer_stateless/beam_search.py
@@ -17,7 +17,6 @@
 from dataclasses import dataclass
 from typing import Dict, List, Optional
 
-import numpy as np
 import torch
 from model import Transducer