diff --git a/LICENSE b/LICENSE
index cad3913..c6df821 100644
--- a/LICENSE
+++ b/LICENSE
@@ -1,6 +1,6 @@
 BSD 3-Clause License
 
-Copyright (c) 2020-2021, Martin Simon
+Copyright (c) 2020-2022, Martin Simon
 All rights reserved.
 
 Redistribution and use in source and binary forms, with or without
diff --git a/README.md b/README.md
index 226897a..7040989 100644
--- a/README.md
+++ b/README.md
@@ -9,7 +9,7 @@ If you have [Docker](https://www.docker.com/) installed locally, just run the fo
 ```bash
 $ ./build.sh
 ```
-By default this will build i3-gaps 4.20 on Debian Bullseye.
+By default this will build i3-gaps 4.21 on Debian Bullseye.
 
 If you want to customize the build at runtime, use the following:
 
@@ -30,7 +30,7 @@ To publish a new package version to Github, follow these steps:
 ```
 BSD 3-Clause License
 
-Copyright (c) 2020-2021, Martin Simon
+Copyright (c) 2020-2022, Martin Simon
 All rights reserved.
 
 Redistribution and use in source and binary forms, with or without
diff --git a/build.sh b/build.sh
index 818b972..d5ff634 100755
--- a/build.sh
+++ b/build.sh
@@ -4,7 +4,7 @@ set -eu
 
 IMAGE="debian:bullseye-slim"
 TARGET="$(dirname "$0" | xargs realpath)"
-VERSION="4.20.1"
+VERSION="4.21"
 
 while getopts "v:i:h" opt
 do
diff --git a/debian/changelog b/debian/changelog
index a6d4e18..f935cb6 100644
--- a/debian/changelog
+++ b/debian/changelog
@@ -1,3 +1,9 @@
+i3-gaps (4.21) unstable; urgency=medium
+
+  * New upstream release
+
+ -- Martin Simon <me@martinsimon.me>  Thu, 22 Sep 2022 00:00:00 +0000
+
 i3-gaps (4.20.1-1) unstable; urgency=medium
 
   * New upstream release
diff --git a/debian/copyright b/debian/copyright
index d2e6ad7..225afea 100644
--- a/debian/copyright
+++ b/debian/copyright
@@ -7,7 +7,7 @@ Copyright: 2009 Michael Stapelberg
 License: BSD-3-clause
 
 Files: debian/*
-Copyright: 2020-2021 Martin Simon <me@martinsimon.me>
+Copyright: 2020-2022 Martin Simon <me@martinsimon.me>
 License: BSD-3-clause
 
 License: BSD-3-clause