diff --git a/composer.lock b/composer.lock
index e382c70..d0ae8b0 100644
--- a/composer.lock
+++ b/composer.lock
@@ -1079,16 +1079,16 @@
         },
         {
             "name": "symfony/debug",
-            "version": "v3.3.13",
+            "version": "v3.4.0",
             "source": {
                 "type": "git",
                 "url": "https://github.com/symfony/debug.git",
-                "reference": "74557880e2846b5c84029faa96b834da37e29810"
+                "reference": "fb2001e5d85f95d8b6ab94ae3be5d2672df128fd"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/symfony/debug/zipball/74557880e2846b5c84029faa96b834da37e29810",
-                "reference": "74557880e2846b5c84029faa96b834da37e29810",
+                "url": "https://api.github.com/repos/symfony/debug/zipball/fb2001e5d85f95d8b6ab94ae3be5d2672df128fd",
+                "reference": "fb2001e5d85f95d8b6ab94ae3be5d2672df128fd",
                 "shasum": ""
             },
             "require": {
@@ -1099,12 +1099,12 @@
                 "symfony/http-kernel": ">=2.3,<2.3.24|~2.4.0|>=2.5,<2.5.9|>=2.6,<2.6.2"
             },
             "require-dev": {
-                "symfony/http-kernel": "~2.8|~3.0"
+                "symfony/http-kernel": "~2.8|~3.0|~4.0"
             },
             "type": "library",
             "extra": {
                 "branch-alias": {
-                    "dev-master": "3.3-dev"
+                    "dev-master": "3.4-dev"
                 }
             },
             "autoload": {
@@ -1131,7 +1131,7 @@
             ],
             "description": "Symfony Debug Component",
             "homepage": "https://symfony.com",
-            "time": "2017-11-10T16:38:39+00:00"
+            "time": "2017-11-21T09:01:46+00:00"
         },
         {
             "name": "symfony/filesystem",