diff --git a/CHANGELOG.md b/CHANGELOG.md
index af5fd03..840fc67 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -7,6 +7,8 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [unreleased]
 
+## [0.3.1] - 2025-04-11
+
 ### Changed
 
 - Moved register value mask definitions from reg module to field value impl.
@@ -45,7 +47,8 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 - Implemented basic code generation covering current CSR XML.
 
-[unreleased]: https://gitlab.cern.ch/wotsubo/endcap-sl-software-ri-generator/-/compare/v0.3.0...main
+[unreleased]: https://gitlab.cern.ch/wotsubo/endcap-sl-software-ri-generator/-/compare/v0.3.1...main
+[0.3.1]: https://gitlab.cern.ch/wotsubo/endcap-sl-software-ri-generator/-/compare/v0.3.0...v0.3.1
 [0.3.0]: https://gitlab.cern.ch/wotsubo/endcap-sl-software-ri-generator/-/compare/v0.2.0...v0.3.0
 [0.2.0]: https://gitlab.cern.ch/wotsubo/endcap-sl-software-ri-generator/-/compare/v0.1.0...v0.2.0
 [0.1.0]: https://gitlab.cern.ch/wotsubo/endcap-sl-software-ri-generator/~/tags/v0.1.0
diff --git a/Cargo.lock b/Cargo.lock
index 4980269..5a855cc 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -374,7 +374,7 @@ checksum = "60b1af1c220855b6ceac025d3f6ecdd2b7c4894bfe9cd9bda4fbb4bc7c0d4cf0"
 
 [[package]]
 name = "endcap-sl-software-ri-generator"
-version = "0.3.0"
+version = "0.3.1"
 dependencies = [
  "anyhow",
  "chrono",
diff --git a/Cargo.toml b/Cargo.toml
index 3f2d573..ed00b05 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "endcap-sl-software-ri-generator"
-version = "0.3.0"
+version = "0.3.1"
 authors = ["Wataru Otsubo <wataru.otsubo@cern.ch>"]
 edition = "2024"
 description = "A generator of register interface for mpsoc software from register map in xml format"