diff --git a/.bumpversion.cfg b/.bumpversion.cfg
index 3e63e321..f8441140 100644
--- a/.bumpversion.cfg
+++ b/.bumpversion.cfg
@@ -1,11 +1,11 @@
 [bumpversion]
-current_version = 0.9.0
+current_version = 0.10.0
 commit = True
 tag = False
 parse = (?P<major>\d+)\.(?P<minor>\d+)\.(?P<patch>\d+)(\-(?P<pre_release>[a-z]+))?
-serialize =
-    {major}.{minor}.{patch}-{pre_release}
-    {major}.{minor}.{patch}
+serialize = 
+	{major}.{minor}.{patch}-{pre_release}
+	{major}.{minor}.{patch}
 
 [bumpversion:file:columbo/__init__.py]
 
@@ -19,7 +19,7 @@ replace = version = {new_version}
 
 [bumpversion:part:pre_release]
 optional_value = final
-values =
+values = 
 	final
 	dev
 	alpha
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 9f812844..875f1853 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -6,9 +6,20 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+## [0.10.0] - 2021-02-18
+
+### Added
+
+* Python 3.9 support ([#73](https://github.com/wayfair-incubator/columbo/pull/73))
+* New `Validator` signature ([#37](https://github.com/wayfair-incubator/columbo/issues/37))
+
 ### Changed
 
-* Improved validation for converting question names to command line arguments
+* Improved validation for converting question names to command line arguments ([#82](https://github.com/wayfair-incubator/columbo/pull/82))
+
+### Deprecated
+
+* Support for `Validator`s that return `Optional[str]` ([#39](https://github.com/wayfair-incubator/columbo/issues/39))
 
 ## [0.9.0] - 2020-12-18
 
diff --git a/columbo/__init__.py b/columbo/__init__.py
index 11b0aba6..89aeebc8 100644
--- a/columbo/__init__.py
+++ b/columbo/__init__.py
@@ -28,6 +28,6 @@
     Validator,
 )
 
-__version__ = "0.9.0"
+__version__ = "0.10.0"
 __author__ = "Patrick Lannigan <plannigan@wayfair.com>"
 __all__ = []  # type: ignore
diff --git a/docs/index.md b/docs/index.md
index c5cbc5d9..6c07a567 100644
--- a/docs/index.md
+++ b/docs/index.md
@@ -1,4 +1,4 @@
-# Columbo - 0.9.0
+# Columbo - 0.10.0
 
 [![CI pipeline status](https://github.com/wayfair-incubator/columbo/workflows/CI/badge.svg?branch=main)][ci]
 [![PyPI](https://img.shields.io/pypi/v/columbo)][pypi]
diff --git a/setup.cfg b/setup.cfg
index f9c6adef..3be77f73 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -3,7 +3,7 @@ name = columbo
 url = https://github.com/wayfair-incubator/columbo
 author = Patrick Lannigan
 author_email = plannigan@wayfair.com
-version = 0.9.0
+version = 0.10.0
 description = Specify a dynamic set of questions to ask a user and get their answers.
 long_description = file: README.md
 long_description_content_type = text/markdown