diff --git a/requirements.txt b/requirements.txt
index b982cc8..c8a137e 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,9 +1,10 @@
-# this is not complete yet
+# 
 importlib_metadata
 joblib>=1.2.0
 jungfrau_utils>=3.12.1
 lmfit>=1.1.0
 matplotlib
+scikit-image           # for the image history equalization 
 PyYAML
 scipy
 setuptools