diff --git a/CHANGELOG.rst b/CHANGELOG.rst
index f5c4e4a5c..7b8b89c1f 100644
--- a/CHANGELOG.rst
+++ b/CHANGELOG.rst
@@ -5,6 +5,11 @@ Change history for XBlock
 Unreleased
 ----------
 
+4.0.1 - 2024-04-24
+------------------
+
+* unpin lxml constraint.
+
 4.0.0 - 2024-04-18
 ------------------
 
diff --git a/xblock/__init__.py b/xblock/__init__.py
index ff55f6857..92ec4254f 100644
--- a/xblock/__init__.py
+++ b/xblock/__init__.py
@@ -2,4 +2,4 @@
 XBlock Courseware Components
 """
 
-__version__ = '4.0.0'
+__version__ = '4.0.1'