diff --git a/CHANGESLOG.md b/CHANGESLOG.md
index 0d6892b..139dd94 100755
--- a/CHANGESLOG.md
+++ b/CHANGESLOG.md
@@ -7,7 +7,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 
 
-## 4.0.0 - Unreleased
+## 4.0.0 - 2023-01-08
 
 The library was rewriten from scratch around the [PSR-15](https://www.php-fig.org/psr/psr-15/), [PSR-7](https://www.php-fig.org/psr/psr-7/) and [PSR-17](https://www.php-fig.org/psr/psr-17/) specifications.
 
@@ -37,7 +37,7 @@ The library was rewriten from scratch around the [PSR-15](https://www.php-fig.or
 
 - `::setNotFoundHandler()`
 
-
+---
 
 ## 3.0.2 - 2021-11-13
 
diff --git a/composer.json b/composer.json
index 14350a8..c116fea 100755
--- a/composer.json
+++ b/composer.json
@@ -2,9 +2,8 @@
     "name": "adinan-cenci/router", 
     "description": "A small PHP router library.", 
     "type": "library", 
-    "keywords": ["router"], 
+    "keywords": ["http", "router", "psr", "psr-15", "psr-7", "psr-17"], 
     "license": "MIT",
-    "version": "3.0.2", 
     "authors": [
         {
             "name": "Adinan Cenci", 
@@ -13,9 +12,8 @@
         }
     ], 
     "require": { 
-        "php": ">=5.3",
-        "adinancenci/psr-7": "*",
-        "adinancenci/psr-17": "*",
+        "php": ">=7.4",
+        "adinancenci/psr-17": "^1.0.0",
         "psr/http-server-handler": "1.0.x-dev",
         "psr/http-server-middleware": "1.0.x-dev"
     }, 
@@ -24,7 +22,6 @@
             "AdinanCenci\\Router\\": "src/"
         }
     },
-    "minimum-stability": "dev", 
     "repositories": [
         {
             "type": "vcs",