diff --git a/CHANGELOG.md b/CHANGELOG.md
index 53ee5f77..c62711ce 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -5,6 +5,12 @@ 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).
 
+## v3.21.0 - 2024-09-12
+
+* Update dev dependencies and example apps by @zorbash in https://github.com/open-api-spex/open_api_spex/pull/624
+* Support casting decimals by @zorbash in https://github.com/open-api-spex/open_api_spex/pull/634
+* Support decoding operations with :servers. by @loguntsov in https://github.com/open-api-spex/open_api_spex/pull/635
+
 ## v3.20.1 - 2024-07-31
 
 * Support custom error messages in custom validators by @GregorGrasselli in https://github.com/open-api-spex/open_api_spex/pull/621
diff --git a/README.md b/README.md
index 49823306..cdf39c8f 100644
--- a/README.md
+++ b/README.md
@@ -24,7 +24,7 @@ The package can be installed by adding `:open_api_spex` to your list of dependen
 ```elixir
 def deps do
   [
-    {:open_api_spex, "~> 3.20"}
+    {:open_api_spex, "~> 3.21"}
   ]
 end
 ```
diff --git a/mix.exs b/mix.exs
index 6cc36aad..a5c9ef7e 100644
--- a/mix.exs
+++ b/mix.exs
@@ -2,7 +2,7 @@ defmodule OpenApiSpex.Mixfile do
   use Mix.Project
 
   @source_url "https://github.com/open-api-spex/open_api_spex"
-  @version "3.20.1"
+  @version "3.21.0"
 
   def project do
     [