diff --git a/rh_renderer/normalization/histogram_clahe.py b/rh_renderer/normalization/histogram_clahe.py
index c313029..f03348a 100644
--- a/rh_renderer/normalization/histogram_clahe.py
+++ b/rh_renderer/normalization/histogram_clahe.py
@@ -3,7 +3,7 @@
 import cv2
 import numpy as np
 #import ujson as json
-import cPickle as pickle
+import pickle
 import skimage.exposure