diff --git a/CHANGELOG.md b/CHANGELOG.md
index 5f9c46e..d601f6e 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,15 @@
 # Changelog
 
+## v4.0.0 (2023-12-19)
+
+This version removes deprecated functionality and moved all HTML helpers to a separate library. HTML Helpers are no longer used in new apps from Phoenix v1.7. Older applications who wish to maintain compatibility, add `{:phoenix_html_helpers, "~> 1.0"}` to your `mix.exs` and then replace `use Phoenix.HTML` in your applications by:
+
+```elixir
+import Phoenix.HTML
+import Phoenix.HTML.Form
+use PhoenixHTMLHelpers
+```
+
 ## v3.3.3 (2023-10-09)
 
 * Enhancements
diff --git a/mix.exs b/mix.exs
index 365de7d..38fc6b6 100644
--- a/mix.exs
+++ b/mix.exs
@@ -3,7 +3,7 @@ defmodule PhoenixHTML.Mixfile do
 
   # Also change package.json version
   @source_url "https://github.com/phoenixframework/phoenix_html"
-  @version "4.0.0-dev"
+  @version "4.0.0"
 
   def project do
     [
diff --git a/package.json b/package.json
index cc833f8..2494e32 100644
--- a/package.json
+++ b/package.json
@@ -1,13 +1,7 @@
 {
   "name": "phoenix_html",
-  "version": "4.0.0-dev",
+  "version": "4.0.0",
   "main": "./priv/static/phoenix_html.js",
   "repository": {},
-  "files": [
-    "README.md",
-    "CHANGELOG.md",
-    "LICENSE",
-    "package.json",
-    "priv/static/phoenix_html.js"
-  ]
+  "files": ["README.md", "CHANGELOG.md", "LICENSE", "package.json", "priv/static/phoenix_html.js"]
 }