diff --git a/README.md b/README.md
index c5c2905e8..847334daa 100644
--- a/README.md
+++ b/README.md
@@ -20,8 +20,6 @@ Execute this command to install the project:
 $ composer create-project symfony/symfony-demo
 ```
 
-[![Deploy](https://www.herokucdn.com/deploy/button.png)](https://heroku.com/deploy)
-
 Usage
 -----
 
diff --git a/app.json b/app.json
deleted file mode 100644
index c82585210..000000000
--- a/app.json
+++ /dev/null
@@ -1,39 +0,0 @@
-{
-    "name": "Symfony Demo Application",
-    "description": "The official demo application for the Symfony framework.",
-    "keywords": [
-        "php",
-        "symfony"
-    ],
-    "website": "https://symfony.com/download",
-    "repository": "https://github.com/symfony/symfony-demo",
-    "logo": "https://symfony.com/images/v5/pictos/demoapp.svg?v=4",
-    "success_url": "/",
-    "scripts": {
-        "postdeploy": "php bin/console doctrine:schema:create && php bin/console doctrine:fixtures:load -n",
-        "test-setup": "php bin/console doctrine:schema:create && php bin/console doctrine:fixtures:load -n",
-        "test": "phpunit"
-    },
-    "env": {
-        "APP_ENV": {
-            "value": "prod",
-            "description": "If you want to use the Symfony `dev` environment in the deployed application, you must move the necessary dependencies (like SensioGeneratorBundle) from `require-dev` to `require`. This will introduce security issues because development tools like the WebProfiler reveal sensitive information."
-        },
-        "APP_DEBUG": {
-            "value": "0"
-        },
-        "APP_SECRET": {
-            "description": "Extra entropy for %kernel.secret%; used for CSRF tokens, cookies and signed URLs.",
-            "generator": "secret"
-        },
-        "MAILER_URL": {
-            "value": "null://localhost",
-            "description": "A DSN-like configuration string for the mail server. See https://symfony.com/doc/current/reference/configuration/swiftmailer.html#url"
-        },
-        "SYMFONY_LOG": "php://stderr"
-    },
-    "addons": [
-        "heroku-postgresql"
-    ],
-    "image": "heroku/php"
-}