diff --git a/docs/source/CHANGELOG.md b/docs/source/CHANGELOG.md
index 88123eb..8d33ce6 100644
--- a/docs/source/CHANGELOG.md
+++ b/docs/source/CHANGELOG.md
@@ -4,7 +4,7 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
-## Unreleased
+## [0.3.1]
 ### changed
 - remove `evfuncs` module, replace with external `evfuncs` library
   [#114](https://github.com/NickleDave/hybrid-vocal-classifier/pull/114)
diff --git a/pyproject.toml b/pyproject.toml
index bd7c897..14b8881 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -4,7 +4,7 @@ description = "a Python machine learning library for animal vocalizations and bi
 authors = [
     {name = "David Nicholson", email = "nickledave@users.noreply.github.com"},
 ]
-version = "0.3.0"
+version = "0.3.1"
 license = {file = "LICENSE"}
 requires-python = ">=3.7,<3.10"
 dependencies = [
diff --git a/src/hvc/__about__.py b/src/hvc/__about__.py
index bf30035..bd44a37 100644
--- a/src/hvc/__about__.py
+++ b/src/hvc/__about__.py
@@ -25,7 +25,7 @@
 )
 __uri__ = "https://github.com/NickleDave/hybrid-vocal-classifier"
 
-__version__ = "0.3.0"
+__version__ = "0.3.1"
 
 if base_dir is not None and os.path.exists(os.path.join(base_dir, ".commit")):
     with open(os.path.join(base_dir, ".commit")) as fp: