diff --git a/CHANGELOG.md b/CHANGELOG.md
index 7324d376..f6a01866 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,6 +1,13 @@
 # Release Notes
 
-## [Unreleased](https://github.com/laravel/laravel/compare/v8.5.14...master)
+## [Unreleased](https://github.com/laravel/laravel/compare/v8.5.15...master)
+
+
+## [v8.5.15 (2021-03-23)](https://github.com/laravel/laravel/compare/v8.5.14...v8.5.15)
+
+### Changed
+- Add prohibited validation rule ([#5569](https://github.com/laravel/laravel/pull/5569))
+- Re-order composer.json ([#5570](https://github.com/laravel/laravel/pull/5570))
 
 
 ## [v8.5.14 (2021-03-16)](https://github.com/laravel/laravel/compare/v8.5.13...v8.5.14)
diff --git a/composer.json b/composer.json
index 8f171644..54a4a0a8 100644
--- a/composer.json
+++ b/composer.json
@@ -2,10 +2,7 @@
     "name": "laravel/laravel",
     "type": "project",
     "description": "The Laravel Framework.",
-    "keywords": [
-        "framework",
-        "laravel"
-    ],
+    "keywords": ["framework", "laravel"],
     "license": "MIT",
     "require": {
         "php": "^7.4|^8.0",
@@ -22,16 +19,6 @@
         "nunomaduro/collision": "^5.2",
         "phpunit/phpunit": "^9.3.3"
     },
-    "config": {
-        "optimize-autoloader": true,
-        "preferred-install": "dist",
-        "sort-packages": true
-    },
-    "extra": {
-        "laravel": {
-            "dont-discover": []
-        }
-    },
     "autoload": {
         "psr-4": {
             "App\\": "app/",
@@ -44,8 +31,6 @@
             "Tests\\": "tests/"
         }
     },
-    "minimum-stability": "dev",
-    "prefer-stable": true,
     "scripts": {
         "post-autoload-dump": [
             "Illuminate\\Foundation\\ComposerScripts::postAutoloadDump",
@@ -57,5 +42,17 @@
         "post-create-project-cmd": [
             "@php artisan key:generate --ansi"
         ]
-    }
+    },
+    "extra": {
+        "laravel": {
+            "dont-discover": []
+        }
+    },
+    "config": {
+        "optimize-autoloader": true,
+        "preferred-install": "dist",
+        "sort-packages": true
+    },
+    "minimum-stability": "dev",
+    "prefer-stable": true
 }
diff --git a/resources/lang/en/validation.php b/resources/lang/en/validation.php
index 0f861e32..49e3388b 100644
--- a/resources/lang/en/validation.php
+++ b/resources/lang/en/validation.php
@@ -104,6 +104,7 @@ return [
     'required_with_all' => 'The :attribute field is required when :values are present.',
     'required_without' => 'The :attribute field is required when :values is not present.',
     'required_without_all' => 'The :attribute field is required when none of :values are present.',
+    'prohibited' => 'The :attribute field is prohibited.',
     'prohibited_if' => 'The :attribute field is prohibited when :other is :value.',
     'prohibited_unless' => 'The :attribute field is prohibited unless :other is in :values.',
     'same' => 'The :attribute and :other must match.',