diff --git a/rfplot.py b/rfplot.py
index e5bb106..243d976 100755
--- a/rfplot.py
+++ b/rfplot.py
@@ -17,6 +17,7 @@ from datetime import datetime, timedelta
 import h5py
 import json
 import requests
+import shutil
 from astropy.time import Time
 from  astropy.visualization import ZScaleInterval
 C = 299792.458 # km/s