diff --git a/CHANGELOG.rst b/CHANGELOG.rst
index be0ca6f4..a9305abb 100644
--- a/CHANGELOG.rst
+++ b/CHANGELOG.rst
@@ -1,6 +1,11 @@
 Change Log
 ==========
 
+v2.3.4
+------
+
+Support for new versions of `castepxbin`.
+
 v2.3.3
 ------
 
diff --git a/sumo/__init__.py b/sumo/__init__.py
index 695cb7ae..6ed215d0 100644
--- a/sumo/__init__.py
+++ b/sumo/__init__.py
@@ -5,4 +5,4 @@
 Sumo is a set of scripts and an API for dealing with VASP output files.
 """
 
-__version__ = "2.3.3"
+__version__ = "2.3.4"