diff --git a/CHANGELOG.md b/CHANGELOG.md
index 33c06fe..38b0c6d 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -3,6 +3,8 @@ All notable changes to this project will be documented in this file. The format
 
 ## [Unreleased]
 
+## [2.1.0] - 2023-09-25
+
 ### Added
 - Add a new example for an easy-to-extend Neo-Hookean Abaqus Umat.
 
diff --git a/version.txt b/version.txt
index c10edc3..7ec1d6d 100644
--- a/version.txt
+++ b/version.txt
@@ -1 +1 @@
-2.1.0-dev
+2.1.0