diff --git a/src/g5505_utils.py b/src/g5505_utils.py
index 6eade8d..082e906 100644
--- a/src/g5505_utils.py
+++ b/src/g5505_utils.py
@@ -3,6 +3,7 @@ import os
 import shutil
 import datetime
 import logging
+import numpy as np
 
 def setup_logging(log_dir, log_filename):
     """Sets up logging to a specified directory and file.