diff --git a/docs/index.rst b/docs/index.rst
index cbb4c76..b3d2f77 100644
--- a/docs/index.rst
+++ b/docs/index.rst
@@ -402,6 +402,11 @@ The rendered object description:
 Change Log
 ==========
 
+2022-06-26 2.3.1
+----------------
+
+- Fix crash when noting object with duplicate reference (#18)
+
 2022-04-09 2.3
 --------------
 
diff --git a/sphinxnotes/any/__init__.py b/sphinxnotes/any/__init__.py
index 150491d..fb49689 100644
--- a/sphinxnotes/any/__init__.py
+++ b/sphinxnotes/any/__init__.py
@@ -22,7 +22,7 @@
 
 __title__= 'sphinxnotes-any'
 __license__ = 'BSD'
-__version__ = '2.3'
+__version__ = '2.3.1'
 __author__ = 'Shengyu Zhang'
 __url__ = 'https://sphinx-notes.github.io/any'
 __description__ = 'Sphinx Domain for describing Anything'