diff --git a/composer.lock b/composer.lock
index bc09757..853e94a 100644
--- a/composer.lock
+++ b/composer.lock
@@ -2955,16 +2955,16 @@
         },
         {
             "name": "symfony/flex",
-            "version": "v1.1.0",
+            "version": "v1.5.3",
             "source": {
                 "type": "git",
                 "url": "https://github.com/symfony/flex.git",
-                "reference": "d6f5fed47ddad2eb25d5cc19316692203a2898eb"
+                "reference": "59b42aa1d3385a21683601c15e63eb35d2ebe8a4"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/symfony/flex/zipball/d6f5fed47ddad2eb25d5cc19316692203a2898eb",
-                "reference": "d6f5fed47ddad2eb25d5cc19316692203a2898eb",
+                "url": "https://api.github.com/repos/symfony/flex/zipball/59b42aa1d3385a21683601c15e63eb35d2ebe8a4",
+                "reference": "59b42aa1d3385a21683601c15e63eb35d2ebe8a4",
                 "shasum": ""
             },
             "require": {
@@ -2973,12 +2973,14 @@
             },
             "require-dev": {
                 "composer/composer": "^1.0.2",
-                "symfony/phpunit-bridge": "^3.2.8"
+                "symfony/dotenv": "^3.4|^4.0|^5.0",
+                "symfony/phpunit-bridge": "^3.4.19|^4.1.8|^5.0",
+                "symfony/process": "^2.7|^3.0|^4.0|^5.0"
             },
             "type": "composer-plugin",
             "extra": {
                 "branch-alias": {
-                    "dev-master": "1.1-dev"
+                    "dev-master": "1.5-dev"
                 },
                 "class": "Symfony\\Flex\\Flex"
             },
@@ -2998,7 +3000,7 @@
                 }
             ],
             "description": "Composer plugin for Symfony",
-            "time": "2018-08-21T07:51:18+00:00"
+            "time": "2019-12-01T15:56:52+00:00"
         },
         {
             "name": "symfony/framework-bundle",
@@ -4799,19 +4801,19 @@
             "authors": [
                 {
                     "name": "Fabien Potencier",
-                    "role": "Lead Developer",
                     "email": "fabien@symfony.com",
-                    "homepage": "http://fabien.potencier.org"
+                    "homepage": "http://fabien.potencier.org",
+                    "role": "Lead Developer"
                 },
                 {
                     "name": "Armin Ronacher",
-                    "role": "Project Founder",
-                    "email": "armin.ronacher@active-4.com"
+                    "email": "armin.ronacher@active-4.com",
+                    "role": "Project Founder"
                 },
                 {
                     "name": "Twig Team",
-                    "role": "Contributors",
-                    "homepage": "https://twig.symfony.com/contributors"
+                    "homepage": "https://twig.symfony.com/contributors",
+                    "role": "Contributors"
                 }
             ],
             "description": "Twig, the flexible, fast, and secure template language for PHP",