diff --git a/.scrutinizer.yml b/.scrutinizer.yml
index c34ffd6..30d8e0f 100644
--- a/.scrutinizer.yml
+++ b/.scrutinizer.yml
@@ -13,6 +13,7 @@ tools:
   php_analyzer: true
   php_pdepend: true
 
-php:
-  code_rating: true
-  duplication: true
\ No newline at end of file
+checks:
+  php:
+    code_rating: true
+    duplication: true
\ No newline at end of file
diff --git a/composer.json b/composer.json
index 783d724..7c9e1e0 100644
--- a/composer.json
+++ b/composer.json
@@ -31,9 +31,9 @@
     },
     "require": {
         "php": ">=5.5",
-        "symfony/config": "^2.8|^3.0",
-        "symfony/http-kernel": "^2.8|^3.0",
-        "symfony/dependency-injection": "^2.8|^3.0",
+        "symfony/config": "^2.8|^3.0|^4.0",
+        "symfony/http-kernel": "^2.8|^3.0|^4.0",
+        "symfony/dependency-injection": "^2.8|^3.0|^4.0",
         "bornfree/tactician-doctrine-domain-events": "^0.4.0"
     },
     "minimum-stability": "stable"