diff --git a/app/Controllers/ControllerAbstract.php b/app/Controllers/ControllerAbstract.php
index ff7689a4..039b9b7f 100644
--- a/app/Controllers/ControllerAbstract.php
+++ b/app/Controllers/ControllerAbstract.php
@@ -13,7 +13,7 @@ abstract class ControllerAbstract
    *
    * @var ContainerInterface
    */
-    protected $container;
+    protected ContainerInterface $container;
 
     protected Twig $view;
 
@@ -33,70 +33,6 @@ public function __construct(ContainerInterface $container)
         unset($container);
     }
 
-
-   /**
-   * Get Slim Container
-   *
-   * @return ContainerInterface
-   */
-    protected function getContainer()
-    {
-        return $this->container;
-    }
-
-   /**
-   * Get Service From Container
-   *
-   * @param string $service
-   * @return mixed
-   */
-    protected function getService($service)
-    {
-        return $this->container->get($service);
-    }
-
-   /**
-   * Get Request
-   *
-   * @return Request
-   */
-    protected function getRequest()
-    {
-        return $this->container->request;
-    }
-
-   /**
-   * Get Response
-   *
-   * @return Response
-   */
-    protected function getResponse()
-    {
-        return $this->container->get('response');
-    }
-
-   /**
-   * Get Twig Engine
-   *
-   * @return Twig
-   */
-    /*protected function getView()
-    {
-        return $this->container->get(Twig::class);
-    }*/
-
-   /**
-   * Render view
-   *
-   * @param string $template
-   * @param array $data
-   * @return string
-   */
-    /*protected function render($template, $data = [])
-    {
-        return $this->getView()->render($this->getResponse(), $template, $data);
-    }*/
-
     /**
      * Get a JSON response
      *
diff --git a/app/Controllers/Reference.php b/app/Controllers/Reference.php
index 1179e748..34d9f682 100644
--- a/app/Controllers/Reference.php
+++ b/app/Controllers/Reference.php
@@ -9,7 +9,7 @@
 class Reference extends ControllerAbstract
 {
 
-    public function view(Request $request, Response $response)
+    public function view(Request $request, Response $response): Response
     {
         $get = $request->getQueryParams();
         // default session param for this controller
@@ -124,7 +124,7 @@ function ($key) use ($join_table) {
         return $response;
     }
 
-    public function register(Request $request, Response $response)
+    public function register(Request $request, Response $response): Response
     {
         $post = $request->getParsedBody();
 
@@ -203,7 +203,7 @@ public function register(Request $request, Response $response)
             );
     }
 
-    public function filter(Request $request, Response $response)
+    public function filter(Request $request, Response $response): Response
     {
         $post = $request->getParsedBody();
         if (isset($post['reset_filters'])) {
@@ -223,7 +223,7 @@ public function filter(Request $request, Response $response)
             );
     }
 
-    public function order(Request $request, Response $response, string $field)
+    public function order(Request $request, Response $response, string $field): Response
     {
         if ($_SESSION['reference']['orderby'] == $field) {
             // toggle sort if orderby requested on the same column
@@ -240,5 +240,4 @@ public function order(Request $request, Response $response, string $field)
                 $this->routeparser->urlFor('reference')
             );
     }
-
 }
diff --git a/app/Controllers/Telemetry.php b/app/Controllers/Telemetry.php
index 6cbd2065..52ab120a 100644
--- a/app/Controllers/Telemetry.php
+++ b/app/Controllers/Telemetry.php
@@ -16,7 +16,7 @@
 class Telemetry extends ControllerAbstract
 {
 
-    public function view(Request $request, Response $response)
+    public function view(Request $request, Response $response): Response
     {
         $get   = $request->getQueryParams();
         $years = 99;
@@ -231,7 +231,7 @@ public function view(Request $request, Response $response)
         return $response;
     }
 
-    public function send(Request $request, Response $response)
+    public function send(Request $request, Response $response): Response
     {
         $response = $response->withHeader('Content-Type', 'application/json');
 
@@ -304,7 +304,7 @@ public function send(Request $request, Response $response)
         return $this->withJson($response, ['message' => 'OK']);
     }
 
-    public function geojson(Request $request, Response $response)
+    public function geojson(Request $request, Response $response): Response
     {
         $countries = null;
 
@@ -353,7 +353,7 @@ public function geojson(Request $request, Response $response)
         return $this->withJson($response, (array)json_decode($countries));
     }
 
-    public function schema(Request $request, Response $response)
+    public function schema(Request $request, Response $response): Response
     {
         //$cache = $this->container->settings->get('debug') == true ? null : $this->container->cache;
         $cache = $this->container->get('cache');
@@ -361,7 +361,7 @@ public function schema(Request $request, Response $response)
         return $this->withJson($response, $schema);
     }
 
-    public function allPlugins(Request $request, Response $response)
+    public function allPlugins(Request $request, Response $response): Response
     {
         $years = 99;
         $get   = $request->getQueryParams();
diff --git a/app/Project.php b/app/Project.php
index 17b3a111..ee956705 100644
--- a/app/Project.php
+++ b/app/Project.php
@@ -48,7 +48,7 @@ public function __construct($logger = null)
      *
      * @return Project
      */
-    public function setConfig($config)
+    public function setConfig(array $config): self
     {
         $this->checkConfig($config);
 
@@ -152,13 +152,13 @@ private function setSchemaConfig($config)
     }
 
     /**
-     * Generate or retrieve project's schema
+     * Generate or retrieve project's schema as JSON
      *
      * @param Laminas\Cache\Storage\Adapter\AbstractAdapter|null $cache Cache instance
      *
-     * @return json
+     * @return string
      */
-    public function getSchema($cache)
+    public function getSchema($cache): string
     {
         if (null != $cache && $cache->hasItem('schema')) {
             $schema = $cache->getItem($this->getSlug() . '_schema.json');
@@ -241,7 +241,7 @@ public function getSchema($cache)
      *
      * @return array
      */
-    public function mapModel($json)
+    public function mapModel(array $json): array
     {
         $slug = $this->getSlug();
 
@@ -306,7 +306,7 @@ public function mapModel($json)
      *
      * @return string
      */
-    public function truncate($string, $length)
+    public function truncate(string $string, int $length): string
     {
         if (mb_strlen($string) > $length) {
             if ($this->logger !== null) {
@@ -325,7 +325,7 @@ public function truncate($string, $length)
      *
      * @return string
      */
-    public function getSlug()
+    public function getSlug(): string
     {
         return $this->slug;
     }
@@ -335,7 +335,7 @@ public function getSlug()
      *
      * @return string
      */
-    public function getURL()
+    public function getURL(): string
     {
         return $this->url;
     }
@@ -345,7 +345,7 @@ public function getURL()
      *
      * @return array
      */
-    public function getFooterLinks()
+    public function getFooterLinks(): array
     {
         return $this->footer_links;
     }
@@ -355,7 +355,7 @@ public function getFooterLinks()
      *
      * @return array
      */
-    public function getSocialLinks()
+    public function getSocialLinks(): array
     {
         return $this->social_links;
     }
@@ -363,9 +363,9 @@ public function getSocialLinks()
     /**
      * Get dynamic references
      *
-     * @return array|false
+     * @return array
      */
-    public function getDynamicReferences()
+    public function getDynamicReferences(): array
     {
         return $this->dyn_references;
     }
diff --git a/app/init.php b/app/init.php
index 6bcc267f..f7bc8036 100644
--- a/app/init.php
+++ b/app/init.php
@@ -67,10 +67,6 @@
 
 $app->addRoutingMiddleware();
 
-// init slim
-/*$app       = new \Slim\App(["settings" => $config]);
-$container = $app->getContainer();*/
-
 $container->set('mail_from', $config['mail_from']);
 $container->set('mail_admin', $config['mail_admin']);
 $container->set('is_debug', $config['debug']);