diff --git a/CHANGELOG.md b/CHANGELOG.md
index 2db7373..2a1eeb9 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,8 @@
 # Changelog
 
+## 0.3.5 (21.12.2022)
+* Update build badge and lock to ubuntu-20.04.
+
 ## 0.3.4 (25.10.2022)
 * Enable ExCoveralls with parallel builds.
 
diff --git a/README.md b/README.md
index 80ba58a..a23a2ad 100644
--- a/README.md
+++ b/README.md
@@ -15,7 +15,7 @@ XDR is an open data format, specified in [RFC 4506](http://tools.ietf.org/html/r
 ```elixir
 def deps do
   [
-    {:elixir_xdr, "~> 0.3.4"}
+    {:elixir_xdr, "~> 0.3.5"}
   ]
 end
 ```
diff --git a/mix.exs b/mix.exs
index b5b1791..b3b0bff 100644
--- a/mix.exs
+++ b/mix.exs
@@ -2,7 +2,7 @@ defmodule XDR.MixProject do
   use Mix.Project
 
   @github_url "https://github.com/kommitters/elixir_xdr"
-  @version "0.3.4"
+  @version "0.3.5"
 
   def project do
     [