diff --git a/.castor/qa.php b/.castor/qa.php
index 184b20e..40f050f 100644
--- a/.castor/qa.php
+++ b/.castor/qa.php
@@ -15,22 +15,22 @@ function all(): void
 #[AsTask(description: 'Installs tooling')]
 function install(): void
 {
-    docker_compose_run('composer install -o', workDir: '/home/app/root/tools/php-cs-fixer');
-    docker_compose_run('composer install -o', workDir: '/home/app/root/tools/phpstan');
+    docker_compose_run('composer install -o --working-dir=tools/php-cs-fixer');
+    docker_compose_run('composer install -o --working-dir=tools/phpstan');
 }
 
 #[AsTask(description: 'Runs PHPStan')]
 function phpstan(): void
 {
-    docker_compose_run('phpstan --configuration=/home/app/root/phpstan.neon', workDir: '/home/app/application');
+    docker_compose_run('phpstan');
 }
 
 #[AsTask(description: 'Fixes Coding Style')]
 function cs(bool $dryRun = false): void
 {
     if ($dryRun) {
-        docker_compose_run('php-cs-fixer fix --dry-run --diff', workDir: '/home/app/root');
+        docker_compose_run('php-cs-fixer fix --dry-run --diff');
     } else {
-        docker_compose_run('php-cs-fixer fix', workDir: '/home/app/root');
+        docker_compose_run('php-cs-fixer fix');
     }
 }
diff --git a/.castor/utils.php b/.castor/utils.php
index f6bc8fd..340666e 100644
--- a/.castor/utils.php
+++ b/.castor/utils.php
@@ -66,7 +66,6 @@ function create_default_context(): Context
         'project_name' => 'app',
         'root_domain' => 'app.test',
         'extra_domains' => [],
-        'project_directory' => 'application',
         'php_version' => '8.2',
         'docker_compose_files' => [
             'docker-compose.yml',
@@ -163,7 +162,6 @@ function docker_compose(array $subCommand, Context $c = null, bool $withBuilder
         ->withTimeout(null)
         ->withEnvironment([
             'PROJECT_NAME' => variable('project_name'),
-            'PROJECT_DIRECTORY' => variable('project_directory'),
             'PROJECT_ROOT_DOMAIN' => variable('root_domain'),
             'PROJECT_DOMAINS' => $domains,
             'USER_ID' => variable('user_id'),
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 9a2e1f3..d09510e 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -12,6 +12,7 @@
 * Drop support for PHP < 8.1
 * Add some PHP tooling (PHP-CS-Fixer, PHPStan)
 * Add `castor init` command to initialize a new project
+* Remove support for custom `project_directory`
 
 ## 3.11.0 (2023-05-30)
 
diff --git a/README.md b/README.md
index 22a491b..0b7c38d 100644
--- a/README.md
+++ b/README.md
@@ -32,9 +32,6 @@ domain where the application will be available;
 * `extra_domains` (optional): This contains extra domains where the application
 will be available;
 
-* `project_directory` (optional, default: `application`): This is the host
-directory containing your PHP application;
-
 * `php_version` (optional, default: `8.2`): This is PHP version.
 
 For example:
@@ -53,7 +50,6 @@ function create_default_parameters(): Context
             "admin.{$projectName}.{$tld}",
             "api.{$projectName}.{$tld}",
         ],
-        'project_directory' => 'application',
         'php_version' => 8.2,
     ];
 )
@@ -177,7 +173,7 @@ If you want to use Webpack Encore in a Symfony project,
                 context: services/php
                 target: builder
             volumes:
-                - "../../${PROJECT_DIRECTORY}:/home/app/application:cached"
+                - "../..:/home/app/application:cached"
             command: "yarn run dev-server --hot --host 0.0.0.0 --allowed-hosts encore.${PROJECT_ROOT_DOMAIN} --allowed-hosts ${PROJECT_ROOT_DOMAIN} --client-web-socket-url-hostname encore.${PROJECT_ROOT_DOMAIN} --client-web-socket-url-port 443 --client-web-socket-url-protocol wss"
             labels:
                 - "traefik.enable=true"
@@ -662,7 +658,7 @@ services:
             context: services/php
             target: cron
         volumes:
-            - "../../${PROJECT_DIRECTORY}:/home/app/application:cached"
+            - "../..:/home/app/application:cached"
 ```
 
 </details>
@@ -796,7 +792,7 @@ index 2eda814..59f8fed 100644
 +            - mysql
              #- rabbitmq
          volumes:
-             - "../../${PROJECT_DIRECTORY}:/home/app/application:cached"
+             - "../..:/home/app/application:cached"
 diff --git a/infrastructure/docker/docker-compose.yml b/infrastructure/docker/docker-compose.yml
 index 49a2661..1804a01 100644
 --- a/infrastructure/docker/docker-compose.yml
@@ -817,7 +813,7 @@ index 49a2661..1804a01 100644
 -            - postgres
 +            - mysql
          volumes:
-             - "../../${PROJECT_DIRECTORY}:/home/app/application:cached"
+             - "../..:/home/app/application:cached"
          labels:
 @@ -24,10 +24,7 @@ services:
              # Comment the next line to be able to access frontend via HTTP instead of HTTPS
diff --git a/castor.php b/castor.php
index e1592f5..db51d87 100644
--- a/castor.php
+++ b/castor.php
@@ -23,7 +23,6 @@ function create_default_variables(): array
         'extra_domains' => [
             "www.{$projectName}.{$tld}",
         ],
-        'project_directory' => 'application',
         'php_version' => $_SERVER['DS_PHP_VERSION'] ?? '8.2',
     ];
 }
@@ -49,14 +48,14 @@ function start(): void
 #[AsTask(description: 'Installs the application (composer, yarn, ...)', namespace: 'app')]
 function install(): void
 {
-    $basePath = sprintf('%s/%s', variable('root_dir'), variable('project_directory'));
+    $rootDir = variable('root_dir');
 
-    if (is_file("{$basePath}/composer.json")) {
+    if (is_file("{$rootDir}/composer.json")) {
         docker_compose_run('composer install -n --prefer-dist --optimize-autoloader');
     }
-    if (is_file("{$basePath}/yarn.lock")) {
+    if (is_file("{$rootDir}/yarn.lock")) {
         docker_compose_run('yarn');
-    } elseif (is_file("{$basePath}/package.json")) {
+    } elseif (is_file("{$rootDir}/package.json")) {
         docker_compose_run('npm install');
     }
 
diff --git a/infrastructure/docker/docker-compose.builder.yml b/infrastructure/docker/docker-compose.builder.yml
index b79f0cf..c6ff270 100644
--- a/infrastructure/docker/docker-compose.builder.yml
+++ b/infrastructure/docker/docker-compose.builder.yml
@@ -22,5 +22,4 @@ services:
         volumes:
             - "builder-data:/home/app"
             - "${COMPOSER_CACHE_DIR}:/home/app/.composer/cache"
-            - "../../${PROJECT_DIRECTORY}:/home/app/application:cached"
-            - "../..:/home/app/root:cached"
+            - "../..:/home/app/application:cached"
diff --git a/infrastructure/docker/docker-compose.worker.yml b/infrastructure/docker/docker-compose.worker.yml
index bc3a2c3..abbcf6c 100644
--- a/infrastructure/docker/docker-compose.worker.yml
+++ b/infrastructure/docker/docker-compose.worker.yml
@@ -10,7 +10,7 @@ x-services-templates:
             - postgres
             #- rabbitmq
         volumes:
-            - "../../${PROJECT_DIRECTORY}:/home/app/application:cached"
+            - "../..:/home/app/application:cached"
         user: app
         labels:
             - "docker-starter.worker.${PROJECT_NAME}"
diff --git a/infrastructure/docker/docker-compose.yml b/infrastructure/docker/docker-compose.yml
index 4e75fbb..b47d23f 100644
--- a/infrastructure/docker/docker-compose.yml
+++ b/infrastructure/docker/docker-compose.yml
@@ -18,7 +18,7 @@ services:
         depends_on:
             - postgres
         volumes:
-            - "../../${PROJECT_DIRECTORY}:/home/app/application:cached"
+            - "../..:/home/app/application:cached"
         environment:
             - "PHP_VERSION=${PHP_VERSION}"
         labels:
diff --git a/infrastructure/docker/services/php/Dockerfile b/infrastructure/docker/services/php/Dockerfile
index e97d1b0..67df299 100644
--- a/infrastructure/docker/services/php/Dockerfile
+++ b/infrastructure/docker/services/php/Dockerfile
@@ -115,4 +115,4 @@ RUN mkdir -p "/home/app/.composer/cache" \
     && chown app: /home/app/.composer -R
 
 # Third party tools
-ENV PATH="$PATH:/home/app/root/tools/bin"
+ENV PATH="$PATH:/home/app/application/tools/bin"
diff --git a/phpstan.neon b/phpstan.neon
index e819040..9242929 100644
--- a/phpstan.neon
+++ b/phpstan.neon
@@ -18,7 +18,6 @@ parameters:
                 project_name: string,
                 root_domain: string,
                 extra_domains: string[],
-                project_directory: string,
                 php_version: string,
                 docker_compose_files: string[],
                 macos: bool,
diff --git a/application/public/index.php b/public/index.php
similarity index 100%
rename from application/public/index.php
rename to public/index.php