diff --git a/CHANGELOG.md b/CHANGELOG.md
index 90b63f50..d817abfa 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -5,6 +5,8 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+## [0.4.0] - 2023-11-13
+
 ### Added
 
 - a separator for joining node values in `link` can be set with attribute `value_sep`
diff --git a/CITATION.cff b/CITATION.cff
index 8ad8138c..24c4c4a8 100644
--- a/CITATION.cff
+++ b/CITATION.cff
@@ -29,5 +29,5 @@ abstract: >-
   representation and already provides a basic set of data
   handling modules.
 license: Apache-2.0
-version: 0.3.1
-date-released: '2023-08-04'
+version: 0.4.0
+date-released: '2023-11-13'
diff --git a/Cargo.toml b/Cargo.toml
index 10a4f787..6c768726 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -6,7 +6,7 @@ homepage = "https://github.com/korpling/annatto/"
 license = "Apache-2.0"
 name = "annatto"
 repository = "https://github.com/korpling/annatto/"
-version = "0.3.1"
+version = "0.4.0"
 
 [dependencies]
 ansi_term = "0.12"