diff --git a/CHANGELOG.md b/CHANGELOG.md
index ea94138..94a4621 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,6 +2,8 @@
 
 ## master
 
+## v4.0.4 [2023-09-29]
+
 - [Improved] Updated all the dependencies
 - [Improved] Varies small fixes and improvements
 
diff --git a/mix.exs b/mix.exs
index a17d08c..a73994a 100644
--- a/mix.exs
+++ b/mix.exs
@@ -2,13 +2,13 @@ defmodule OPQ.Mixfile do
   use Mix.Project
 
   @source_url "https://github.com/fredwu/opq"
-  @version "4.0.3"
+  @version "4.0.4"
 
   def project do
     [
       app: :opq,
       version: @version,
-      elixir: "~> 1.5",
+      elixir: "~> 1.13",
       elixirc_paths: elixirc_paths(Mix.env()),
       package: package(),
       name: "OPQ: One Pooled Queue",