diff --git a/CITATION.cff b/CITATION.cff
index 2ce3151c..a8f20850 100644
--- a/CITATION.cff
+++ b/CITATION.cff
@@ -1,5 +1,6 @@
 cff-version: 1.2.0
 title: A pynxtools reader plugin for X-ray photoelectron spectroscopy (XPS) data
+version: 0.4.2
 message:
   If you use this software, please cite it using the
   metadata from this file.