diff --git a/composer.json b/composer.json
index 1a556a4..5e02d02 100644
--- a/composer.json
+++ b/composer.json
@@ -17,10 +17,10 @@
         "nikic/php-parser": "^4.0|^5.0",
         "phpunit/php-text-template": "^1.2.1|^2.0|^3.0",
         "psr/log": "^1.0|^2.0|^3.0",
-        "symfony/finder": "^4.1|^5.0|^6.0",
-        "symfony/config": "^3.4|^4.0|^5.0|^6.0",
-        "symfony/console": "^3.4|^4.0|^5.0|^6.0",
-        "symfony/yaml": "^3.4|^4.0|^5.0|^6.0"
+        "symfony/finder": "^3.4|^4.1|^5.0|^6.0|^7.0",
+        "symfony/config": "^3.4|^4.0|^5.0|^6.0|^7.0",
+        "symfony/console": "^3.4|^4.0|^5.0|^6.0|^7.0",
+        "symfony/yaml": "^3.4|^4.0|^5.0|^6.0|^7.0"
     },
     "require-dev": {
         "escapestudios/symfony2-coding-standard": "^3.9",
diff --git a/src/analyzer/Config/Configuration.php b/src/analyzer/Config/Configuration.php
index 008f2c9..5a8e883 100644
--- a/src/analyzer/Config/Configuration.php
+++ b/src/analyzer/Config/Configuration.php
@@ -11,7 +11,7 @@ class Configuration implements ConfigurationInterface
 {
     public const CONFIG_ROOT = '';
 
-    public function getConfigTreeBuilder()
+    public function getConfigTreeBuilder(): TreeBuilder
     {
         $treeBuilder = new TreeBuilder(self::CONFIG_ROOT);
         if (method_exists($treeBuilder, 'getRootNode')) {
diff --git a/src/analyzer/composer.json b/src/analyzer/composer.json
index 8b30ae7..1cb6eec 100644
--- a/src/analyzer/composer.json
+++ b/src/analyzer/composer.json
@@ -16,10 +16,10 @@
         "nikic/php-parser": "^4.0|^5.0",
         "phpunit/php-text-template": "^1.2.1|^2.0|^3.0",
         "scheb/tombstone-core": "self.version",
-        "symfony/finder": "^4.1|^5.0|^6.0",
-        "symfony/config": "^3.4|^4.0|^5.0|^6.0",
-        "symfony/console": "^3.4|^4.0|^5.0|^6.0",
-        "symfony/yaml": "^3.4|^4.0|^5.0|^6.0"
+        "symfony/finder": "^3.4|^4.1|^5.0|^6.0|^7.0",
+        "symfony/config": "^3.4|^4.0|^5.0|^6.0|^7.0",
+        "symfony/console": "^3.4|^4.0|^5.0|^6.0|^7.0",
+        "symfony/yaml": "^3.4|^4.0|^5.0|^6.0|^7.0"
     },
     "bin": [
         "tombstone-analyzer"