diff --git a/PyASL/pyasl/utils/mricloud_helpers.py b/PyASL/pyasl/utils/mricloud_helpers.py
index c02d1aa..69de78a 100644
--- a/PyASL/pyasl/utils/mricloud_helpers.py
+++ b/PyASL/pyasl/utils/mricloud_helpers.py
@@ -1,4 +1,5 @@
 import os
+import re
 import glob
 import numpy as np
 import nibabel as nib