diff --git a/composer.lock b/composer.lock
index edbd8e4..214a4fa 100644
--- a/composer.lock
+++ b/composer.lock
@@ -4,7 +4,7 @@
         "Read more about it at https://getcomposer.org/doc/01-basic-usage.md#installing-dependencies",
         "This file is @generated automatically"
     ],
-    "content-hash": "24794ee15462466f9827d064104cbe42",
+    "content-hash": "db74440ce5176d6edd6daa60e583f779",
     "packages": [
         {
             "name": "asm89/stack-cors",
@@ -12888,26 +12888,26 @@
         },
         {
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-            "version": "v4.3.4",
+            "version": "v3.4.31",
             "source": {
                 "type": "git",
                 "url": "https://github.com/symfony/filesystem.git",
-                "reference": "9abbb7ef96a51f4d7e69627bc6f63307994e4263"
+                "reference": "00e3a6ddd723b8bcfe4f2a1b6f82b98eeeb51516"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/symfony/filesystem/zipball/9abbb7ef96a51f4d7e69627bc6f63307994e4263",
-                "reference": "9abbb7ef96a51f4d7e69627bc6f63307994e4263",
+                "url": "https://api.github.com/repos/symfony/filesystem/zipball/00e3a6ddd723b8bcfe4f2a1b6f82b98eeeb51516",
+                "reference": "00e3a6ddd723b8bcfe4f2a1b6f82b98eeeb51516",
                 "shasum": ""
             },
             "require": {
-                "php": "^7.1.3",
+                "php": "^5.5.9|>=7.0.8",
                 "symfony/polyfill-ctype": "~1.8"
             },
             "type": "library",
             "extra": {
                 "branch-alias": {
-                    "dev-master": "4.3-dev"
+                    "dev-master": "3.4-dev"
                 }
             },
             "autoload": {
@@ -12934,7 +12934,7 @@
             ],
             "description": "Symfony Filesystem Component",
             "homepage": "https://symfony.com",
-            "time": "2019-08-20T14:07:54+00:00"
+            "time": "2019-08-20T13:31:17+00:00"
         },
         {
             "name": "symfony/finder",