diff --git a/CHANGELOG b/CHANGELOG
index 690e49eedf777dd3699ac7a1ebf16b84d9642697..5569503260247f0d2becd29585d48f0bf4bfc60c 100644
--- a/CHANGELOG
+++ b/CHANGELOG
@@ -5,6 +5,12 @@
 Changelog
 ================================================================================
 
+Release 3.4.2
+--------------------------------------------------------------------------------
+
+* Bugfix release: Updates OpenStructure dependency to 2.9.1, exposes
+  keep_sidechain flag in promod3.modelling.BuildSidechains.
+
 Release 3.4.1
 --------------------------------------------------------------------------------