diff --git a/CHANGELOG.md b/CHANGELOG.md
index 2936175..996a1ae 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,6 +1,6 @@
 # Changelog
 
-## Unreleased
+## v0.21.0 - 2023-08-25
 
 - The `gleam/erlang` module gains the `priv_directory` function.
 
diff --git a/gleam.toml b/gleam.toml
index a0927c4..f334c79 100644
--- a/gleam.toml
+++ b/gleam.toml
@@ -1,6 +1,6 @@
 name = "gleam_erlang"
 
-version = "0.20.0"
+version = "0.21.0"
 licences = ["Apache-2.0"]
 description = "A Gleam library for working with Erlang"