diff --git a/src/App/ConfigProvider.php b/src/App/ConfigProvider.php
index e0c6252..3586119 100644
--- a/src/App/ConfigProvider.php
+++ b/src/App/ConfigProvider.php
@@ -4,6 +4,7 @@ namespace App;
 
 use Interop\Container\ContainerInterface;
 use Zend\Cache\Storage\Adapter\Filesystem as FilesytemCache;
+use Zend\Cache\Storage\StorageInterface;
 use Zend\Config\Config;
 use Zend\Http\Client;
 
@@ -49,7 +50,7 @@ class ConfigProvider
                 Service\AvatarService::class => Service\AvatarServiceFactory::class,
                 Service\DataCollectorService::class => Service\DataCollectorServiceFactory::class,
 
-                'service.avatarCache' => function(ContainerInterface $container) {
+                'service.avatarCache' => function(ContainerInterface $container): StorageInterface {
                     $cache  = new FilesytemCache();
                     $cache->getOptions()
                         ->setFromArray([
@@ -58,7 +59,7 @@ class ConfigProvider
                         ]);
                     return $cache;
                 },
-                Client::class => function(ContainerInterface $container) {
+                Client::class => function(ContainerInterface $container): Client {
                     $configArray = $container->get('config');
                     $config = new Config($configArray['app.config']);
 
@@ -70,6 +71,7 @@ class ConfigProvider
                             ->setCurlOption(CURLOPT_PROXYTYPE, $config->get('http.proxy.type'))
                             ->setCurlOption(CURLOPT_PROXY, $config->get('http.proxy.url'));
                     }
+                    return $httpClient;
                 },
             ],
         ];