diff --git a/DependencyInjection/ABELkeycloakBearerOnlyAdapterExtension.php b/DependencyInjection/ABELkeycloakBearerOnlyAdapterExtension.php
index fa685c6..c34c1a9 100644
--- a/DependencyInjection/ABELkeycloakBearerOnlyAdapterExtension.php
+++ b/DependencyInjection/ABELkeycloakBearerOnlyAdapterExtension.php
@@ -11,7 +11,7 @@ use Symfony\Component\HttpKernel\DependencyInjection\Extension;
 class ABELkeycloakBearerOnlyAdapterExtension extends Extension
 {
 
-    public function load(array $configs, ContainerBuilder $container)
+    public function load(array $configs, ContainerBuilder $container): void
     {
         $loader = new XmlFileLoader($container, new FileLocator(__DIR__.'/../Resources/config'));
         $loader->load('services.xml');
diff --git a/DependencyInjection/Configuration.php b/DependencyInjection/Configuration.php
index 0439fc4..297cc8b 100644
--- a/DependencyInjection/Configuration.php
+++ b/DependencyInjection/Configuration.php
@@ -10,7 +10,7 @@ use Symfony\Component\Config\Definition\ConfigurationInterface;
 class Configuration implements ConfigurationInterface
 {
 
-    public function getConfigTreeBuilder()
+    public function getConfigTreeBuilder(): TreeBuilder
     {
         $treeBuilder = new TreeBuilder("abel_keycloak_bearer_only_adapter");
 
diff --git a/composer.json b/composer.json
index f24bb0c..ffc87a8 100644
--- a/composer.json
+++ b/composer.json
@@ -12,10 +12,10 @@
     "minimum-stability": "stable",
     "require": {
         "php": ">=8.3",
-        "symfony/config": "^6.0",
-        "symfony/dependency-injection": "^6.0",
-        "symfony/http-kernel": "^6.0",
-        "symfony/security-bundle": "^6.0",
+        "symfony/config": "^6.0 || ^7.0",
+        "symfony/dependency-injection": "^6.0 || ^7.0",
+        "symfony/http-kernel": "^6.0 || ^7.0",
+        "symfony/security-bundle": "^6.0 || ^7.0",
         "guzzlehttp/guzzle": "^7",
         "ext-json": "*"
     },