diff --git a/composer.json b/composer.json
index 26d8247..7d52ef2 100644
--- a/composer.json
+++ b/composer.json
@@ -7,18 +7,18 @@
     ],
     "require": {
         "php": " >=8.3",
-        "ibexa/core": "~5.0.x-dev",
-        "symfony/config": "^5.4",
-        "symfony/dependency-injection": "^5.4",
-        "symfony/event-dispatcher": "^5.4",
-        "symfony/http-foundation": "^5.4",
-        "symfony/http-kernel": "^5.4",
-        "symfony/notifier": "^5.4",
-        "symfony/yaml": "^5.4"
+        "ibexa/core": "dev-ibx-8470-symfony-6 as 5.0.x-dev",
+        "symfony/config": "^6.4",
+        "symfony/dependency-injection": "^6.4",
+        "symfony/event-dispatcher": "^6.4",
+        "symfony/http-foundation": "^6.4",
+        "symfony/http-kernel": "^6.4",
+        "symfony/notifier": "^6.4",
+        "symfony/yaml": "^6.4"
     },
     "require-dev": {
         "ibexa/code-style": "~2.0.0",
-        "ibexa/doctrine-schema": "~5.0.x-dev",
+        "ibexa/doctrine-schema": "dev-ibx-8470-symfony-6 as 5.0.x-dev",
         "phpstan/phpstan": "^1.10",
         "phpstan/phpstan-phpunit": "^1.3",
         "phpstan/phpstan-symfony": "^1.3",
diff --git a/src/bundle/DependencyInjection/Configuration/Parser/NotificationsConfigParser.php b/src/bundle/DependencyInjection/Configuration/Parser/NotificationsConfigParser.php
index 6ade1dd..c48e836 100644
--- a/src/bundle/DependencyInjection/Configuration/Parser/NotificationsConfigParser.php
+++ b/src/bundle/DependencyInjection/Configuration/Parser/NotificationsConfigParser.php
@@ -14,7 +14,8 @@
 
 final class NotificationsConfigParser extends AbstractParser
 {
-    public const MAPPED_SETTINGS = ['subscriptions'];
+    /** @phpstan-var list<string> */
+    public const array MAPPED_SETTINGS = ['subscriptions'];
 
     public function addSemanticConfig(NodeBuilder $nodeBuilder): void
     {
diff --git a/src/bundle/DependencyInjection/IbexaNotificationsExtension.php b/src/bundle/DependencyInjection/IbexaNotificationsExtension.php
index e854c14..a681aa5 100644
--- a/src/bundle/DependencyInjection/IbexaNotificationsExtension.php
+++ b/src/bundle/DependencyInjection/IbexaNotificationsExtension.php
@@ -20,6 +20,8 @@ final class IbexaNotificationsExtension extends Extension implements PrependExte
 {
     /**
      * @param array<string, mixed> $configs
+     *
+     * @throws \Exception
      */
     public function load(array $configs, ContainerBuilder $container): void
     {