diff --git a/composer.json b/composer.json
index 0ee8df488..3434fc1f5 100644
--- a/composer.json
+++ b/composer.json
@@ -32,14 +32,14 @@
         "psr/log": "^1.0",
         "seld/jsonlint": "^1.4",
         "seld/phar-utils": "^1.0",
-        "symfony/console": "^2.8.52 || ^3.4.35 || ^4.4 || ^5.0",
-        "symfony/filesystem": "^2.8.52 || ^3.4.35 || ^4.4 || ^5.0",
-        "symfony/finder": "^2.8.52 || ^3.4.35 || ^4.4 || ^5.0",
-        "symfony/process": "^2.8.52 || ^3.4.35 || ^4.4 || ^5.0",
+        "symfony/console": "^2.8.52 || ^3.4.35 || ^4.4 || ^5.0 || ^6.0",
+        "symfony/filesystem": "^2.8.52 || ^3.4.35 || ^4.4 || ^5.0 || ^6.0",
+        "symfony/finder": "^2.8.52 || ^3.4.35 || ^4.4 || ^5.0 || ^6.0",
+        "symfony/process": "^2.8.52 || ^3.4.35 || ^4.4 || ^5.0 || ^6.0",
         "react/promise": "^1.2 || ^2.7"
     },
     "require-dev": {
-        "symfony/phpunit-bridge": "^4.2 || ^5.0",
+        "symfony/phpunit-bridge": "^4.2 || ^5.0 || ^6.0",
         "phpspec/prophecy": "^1.10"
     },
     "suggest": {
diff --git a/composer.lock b/composer.lock
index 2e1fdaced..466cd983f 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": "983eaacb5443e19a04f1e119184b1e57",
+    "content-hash": "2587e14c10bc64959963a6f91f5ada71",
     "packages": [
         {
             "name": "composer/ca-bundle",