diff --git a/CHANGELOG.rst b/CHANGELOG.rst
index f4e5a29..40adcb2 100644
--- a/CHANGELOG.rst
+++ b/CHANGELOG.rst
@@ -8,6 +8,13 @@ All notable changes to this project will be documented in this file.
 The format is based on `Keep a Changelog`_, and this project adheres to
 `Semantic Versioning`_.
 
+`0.3.1`_ - Unreleased
+---------------------
+
+(no changes yet)
+
+.. _0.3.1: https://github.com/trezor/python-shamir-mnemonic/compare/v0.3.0...HEAD
+
 `0.3.0`_ - 2024-05-15
 ---------------------
 
diff --git a/pyproject.toml b/pyproject.toml
index a65d0ab..0e55d63 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,6 +1,6 @@
 [tool.poetry]
 name = "shamir-mnemonic"
-version = "0.3.0"
+version = "0.3.1"
 description = "SLIP-39 Shamir Mnemonics"
 authors = ["Trezor <info@trezor.io>"]
 license = "MIT"