diff --git a/ChangeLog b/ChangeLog
index 6f9e1449..d11566b0 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -12,6 +12,15 @@ or
 
 https://bitbucket.org/muonspin/musrfit/commits/all
 
+Release of V1.9.0, 2023/02/17
+=============================
+
+add depth profile user lib:
+A.F.A. Simões, et al.
+Muon implantation experiments in films: obtaining depth-resolved information
+Review of Scientific Instruments. 2020; 91(2): 023906 (7 pp.).
+
+
 Release of V1.8.2, 2022/12/03
 =============================