diff --git a/src/Symfony/Bridge/Doctrine/composer.json b/src/Symfony/Bridge/Doctrine/composer.json
index bfa3a495d8e58..f4da3ac162796 100644
--- a/src/Symfony/Bridge/Doctrine/composer.json
+++ b/src/Symfony/Bridge/Doctrine/composer.json
@@ -21,17 +21,17 @@
         "symfony/polyfill-mbstring": "~1.0"
     },
     "require-dev": {
-        "symfony/stopwatch": "~2.8|~3.0",
-        "symfony/dependency-injection": "~3.3",
-        "symfony/form": "^3.2.5",
-        "symfony/http-kernel": "~2.8|~3.0",
-        "symfony/property-access": "~2.8|~3.0",
-        "symfony/property-info": "~2.8|3.0",
-        "symfony/proxy-manager-bridge": "~2.8|~3.0",
-        "symfony/security": "~2.8|~3.0",
-        "symfony/expression-language": "~2.8|~3.0",
-        "symfony/validator": "^2.8.18|^3.2.5",
-        "symfony/translation": "~2.8|~3.0",
+        "symfony/stopwatch": "~2.8|~3.0|~4.0.0",
+        "symfony/dependency-injection": "~3.3|~4.0.0",
+        "symfony/form": "^3.2.5|~4.0.0",
+        "symfony/http-kernel": "~2.8|~3.0|~4.0.0",
+        "symfony/property-access": "~2.8|~3.0|~4.0.0",
+        "symfony/property-info": "~2.8|3.0|~4.0.0",
+        "symfony/proxy-manager-bridge": "~2.8|~3.0|~4.0.0",
+        "symfony/security": "~2.8|~3.0|~4.0.0",
+        "symfony/expression-language": "~2.8|~3.0|~4.0.0",
+        "symfony/validator": "^2.8.18|^3.2.5|~4.0.0",
+        "symfony/translation": "~2.8|~3.0|~4.0.0",
         "doctrine/data-fixtures": "1.0.*",
         "doctrine/dbal": "~2.4",
         "doctrine/orm": "^2.4.5"
diff --git a/src/Symfony/Bridge/Monolog/composer.json b/src/Symfony/Bridge/Monolog/composer.json
index ee82d5624927f..5622ce1b88b09 100644
--- a/src/Symfony/Bridge/Monolog/composer.json
+++ b/src/Symfony/Bridge/Monolog/composer.json
@@ -18,12 +18,12 @@
     "require": {
         "php": ">=5.5.9",
         "monolog/monolog": "~1.19",
-        "symfony/http-kernel": "~2.8|~3.0"
+        "symfony/http-kernel": "~2.8|~3.0|~4.0.0"
     },
     "require-dev": {
-        "symfony/console": "~2.8|~3.0",
-        "symfony/event-dispatcher": "~2.8|~3.0",
-        "symfony/var-dumper": "~3.3"
+        "symfony/console": "~2.8|~3.0|~4.0.0",
+        "symfony/event-dispatcher": "~2.8|~3.0|~4.0.0",
+        "symfony/var-dumper": "~3.3|~4.0.0"
     },
     "conflict": {
         "symfony/http-foundation": "<3.3"
diff --git a/src/Symfony/Bridge/ProxyManager/composer.json b/src/Symfony/Bridge/ProxyManager/composer.json
index df96cae73c43d..a13589816c652 100644
--- a/src/Symfony/Bridge/ProxyManager/composer.json
+++ b/src/Symfony/Bridge/ProxyManager/composer.json
@@ -17,11 +17,11 @@
     ],
     "require": {
         "php": ">=5.5.9",
-        "symfony/dependency-injection": "~2.8|~3.0",
+        "symfony/dependency-injection": "~2.8|~3.0|~4.0.0",
         "ocramius/proxy-manager": "~0.4|~1.0|~2.0"
     },
     "require-dev": {
-        "symfony/config": "~2.8|~3.0"
+        "symfony/config": "~2.8|~3.0|~4.0.0"
     },
     "autoload": {
         "psr-4": { "Symfony\\Bridge\\ProxyManager\\": "" },
diff --git a/src/Symfony/Bridge/Twig/composer.json b/src/Symfony/Bridge/Twig/composer.json
index 9b431c04362e2..bbeeb4df45ee5 100644
--- a/src/Symfony/Bridge/Twig/composer.json
+++ b/src/Symfony/Bridge/Twig/composer.json
@@ -21,22 +21,22 @@
     },
     "require-dev": {
         "fig/link-util": "^1.0",
-        "symfony/asset": "~2.8|~3.0",
-        "symfony/finder": "~2.8|~3.0",
-        "symfony/form": "^3.2.7",
-        "symfony/http-kernel": "~3.2",
+        "symfony/asset": "~2.8|~3.0|~4.0.0",
+        "symfony/finder": "~2.8|~3.0|~4.0.0",
+        "symfony/form": "^3.2.7|~4.0.0",
+        "symfony/http-kernel": "~3.2|~4.0.0",
         "symfony/polyfill-intl-icu": "~1.0",
-        "symfony/routing": "~2.8|~3.0",
-        "symfony/templating": "~2.8|~3.0",
-        "symfony/translation": "~2.8|~3.0",
-        "symfony/yaml": "~2.8|~3.0",
-        "symfony/security": "~2.8|~3.0",
+        "symfony/routing": "~2.8|~3.0|~4.0.0",
+        "symfony/templating": "~2.8|~3.0|~4.0.0",
+        "symfony/translation": "~2.8|~3.0|~4.0.0",
+        "symfony/yaml": "~2.8|~3.0|~4.0.0",
+        "symfony/security": "~2.8|~3.0|~4.0.0",
         "symfony/security-acl": "~2.8|~3.0",
-        "symfony/stopwatch": "~2.8|~3.0",
-        "symfony/console": "~2.8|~3.0",
-        "symfony/var-dumper": "~2.8.10|~3.1.4|~3.2",
-        "symfony/expression-language": "~2.8|~3.0",
-        "symfony/web-link": "~3.3"
+        "symfony/stopwatch": "~2.8|~3.0|~4.0.0",
+        "symfony/console": "~2.8|~3.0|~4.0.0",
+        "symfony/var-dumper": "~2.8.10|~3.1.4|~3.2|~4.0.0",
+        "symfony/expression-language": "~2.8|~3.0|~4.0.0",
+        "symfony/web-link": "~3.3|~4.0.0"
     },
     "suggest": {
         "symfony/finder": "",
diff --git a/src/Symfony/Bundle/DebugBundle/composer.json b/src/Symfony/Bundle/DebugBundle/composer.json
index f6a6e217a5ea6..e910d4d927e3c 100644
--- a/src/Symfony/Bundle/DebugBundle/composer.json
+++ b/src/Symfony/Bundle/DebugBundle/composer.json
@@ -17,14 +17,14 @@
     ],
     "require": {
         "php": ">=5.5.9",
-        "symfony/http-kernel": "~2.8|~3.0",
-        "symfony/twig-bridge": "~2.8|~3.0",
-        "symfony/var-dumper": "~2.8|~3.0"
+        "symfony/http-kernel": "~2.8|~3.0|~4.0.0",
+        "symfony/twig-bridge": "~2.8|~3.0|~4.0.0",
+        "symfony/var-dumper": "~2.8|~3.0|~4.0.0"
     },
     "require-dev": {
-        "symfony/config": "~3.3",
-        "symfony/dependency-injection": "~3.3",
-        "symfony/web-profiler-bundle": "~2.8|~3.0"
+        "symfony/config": "~3.3|~4.0.0",
+        "symfony/dependency-injection": "~3.3|~4.0.0",
+        "symfony/web-profiler-bundle": "~2.8|~3.0|~4.0.0"
     },
     "suggest": {
         "symfony/config": "For service container configuration",
diff --git a/src/Symfony/Bundle/FrameworkBundle/composer.json b/src/Symfony/Bundle/FrameworkBundle/composer.json
index 63ad8d3246731..5355f61f31cc6 100644
--- a/src/Symfony/Bundle/FrameworkBundle/composer.json
+++ b/src/Symfony/Bundle/FrameworkBundle/composer.json
@@ -18,42 +18,42 @@
     "require": {
         "php": ">=5.5.9",
         "ext-xml": "*",
-        "symfony/cache": "~3.3",
+        "symfony/cache": "~3.3|~4.0.0",
         "symfony/class-loader": "~3.2",
-        "symfony/dependency-injection": "~3.3-beta2",
-        "symfony/config": "~3.3",
-        "symfony/event-dispatcher": "~3.3",
-        "symfony/http-foundation": "~3.3",
-        "symfony/http-kernel": "~3.3",
+        "symfony/dependency-injection": "~3.3-beta2|~4.0.0",
+        "symfony/config": "~3.3|~4.0.0",
+        "symfony/event-dispatcher": "~3.3|~4.0.0",
+        "symfony/http-foundation": "~3.3|~4.0.0",
+        "symfony/http-kernel": "~3.3|~4.0.0",
         "symfony/polyfill-mbstring": "~1.0",
-        "symfony/filesystem": "~2.8|~3.0",
-        "symfony/finder": "~2.8|~3.0",
-        "symfony/routing": "~3.3",
-        "symfony/stopwatch": "~2.8|~3.0",
+        "symfony/filesystem": "~2.8|~3.0|~4.0.0",
+        "symfony/finder": "~2.8|~3.0|~4.0.0",
+        "symfony/routing": "~3.3|~4.0.0",
+        "symfony/stopwatch": "~2.8|~3.0|~4.0.0",
         "doctrine/cache": "~1.0"
     },
     "require-dev": {
         "fig/link-util": "^1.0",
-        "symfony/asset": "~3.3",
-        "symfony/browser-kit": "~2.8|~3.0",
-        "symfony/console": "~3.3",
-        "symfony/css-selector": "~2.8|~3.0",
-        "symfony/dom-crawler": "~2.8|~3.0",
+        "symfony/asset": "~3.3|~4.0.0",
+        "symfony/browser-kit": "~2.8|~3.0|~4.0.0",
+        "symfony/console": "~3.3|~4.0.0",
+        "symfony/css-selector": "~2.8|~3.0|~4.0.0",
+        "symfony/dom-crawler": "~2.8|~3.0|~4.0.0",
         "symfony/polyfill-intl-icu": "~1.0",
-        "symfony/security": "~2.8|~3.0",
-        "symfony/form": "~3.3",
-        "symfony/expression-language": "~2.8|~3.0",
-        "symfony/process": "~2.8|~3.0",
-        "symfony/security-core": "~3.2",
-        "symfony/security-csrf": "~2.8|~3.0",
-        "symfony/serializer": "~3.3",
-        "symfony/translation": "~3.2",
-        "symfony/templating": "~2.8|~3.0",
-        "symfony/validator": "~3.3",
-        "symfony/workflow": "~3.3",
-        "symfony/yaml": "~3.2",
-        "symfony/property-info": "~3.3",
-        "symfony/web-link": "~3.3",
+        "symfony/security": "~2.8|~3.0|~4.0.0",
+        "symfony/form": "~3.3|~4.0.0",
+        "symfony/expression-language": "~2.8|~3.0|~4.0.0",
+        "symfony/process": "~2.8|~3.0|~4.0.0",
+        "symfony/security-core": "~3.2|~4.0.0",
+        "symfony/security-csrf": "~2.8|~3.0|~4.0.0",
+        "symfony/serializer": "~3.3|~4.0.0",
+        "symfony/translation": "~3.2|~4.0.0",
+        "symfony/templating": "~2.8|~3.0|~4.0.0",
+        "symfony/validator": "~3.3|~4.0.0",
+        "symfony/workflow": "~3.3|~4.0.0",
+        "symfony/yaml": "~3.2|~4.0.0",
+        "symfony/property-info": "~3.3|~4.0.0",
+        "symfony/web-link": "~3.3|~4.0.0",
         "doctrine/annotations": "~1.0",
         "phpdocumentor/reflection-docblock": "^3.0",
         "twig/twig": "~1.26|~2.0",
diff --git a/src/Symfony/Bundle/SecurityBundle/composer.json b/src/Symfony/Bundle/SecurityBundle/composer.json
index 84274f8167e99..275c7bbfce0d2 100644
--- a/src/Symfony/Bundle/SecurityBundle/composer.json
+++ b/src/Symfony/Bundle/SecurityBundle/composer.json
@@ -17,29 +17,29 @@
     ],
     "require": {
         "php": ">=5.5.9",
-        "symfony/security": "~3.3",
-        "symfony/dependency-injection": "~3.3-beta2",
-        "symfony/http-kernel": "~3.3",
+        "symfony/security": "~3.3|~4.0.0",
+        "symfony/dependency-injection": "~3.3-beta2|~4.0.0",
+        "symfony/http-kernel": "~3.3|~4.0.0",
         "symfony/polyfill-php70": "~1.0"
     },
     "require-dev": {
-        "symfony/asset": "~2.8|~3.0",
-        "symfony/browser-kit": "~2.8|~3.0",
-        "symfony/console": "~3.2",
-        "symfony/css-selector": "~2.8|~3.0",
-        "symfony/dom-crawler": "~2.8|~3.0",
-        "symfony/form": "^2.8.18|^3.2.5",
-        "symfony/framework-bundle": "^3.2.8",
-        "symfony/http-foundation": "~2.8|~3.0",
+        "symfony/asset": "~2.8|~3.0|~4.0.0",
+        "symfony/browser-kit": "~2.8|~3.0|~4.0.0",
+        "symfony/console": "~3.2|~4.0.0",
+        "symfony/css-selector": "~2.8|~3.0|~4.0.0",
+        "symfony/dom-crawler": "~2.8|~3.0|~4.0.0",
+        "symfony/form": "^2.8.18|^3.2.5|~4.0.0",
+        "symfony/framework-bundle": "^3.2.8|~4.0.0",
+        "symfony/http-foundation": "~2.8|~3.0|~4.0.0",
         "symfony/security-acl": "~2.8|~3.0",
-        "symfony/translation": "~2.8|~3.0",
-        "symfony/twig-bundle": "~2.8|~3.0",
-        "symfony/twig-bridge": "~2.8|~3.0",
-        "symfony/process": "~2.8|~3.0",
-        "symfony/validator": "^3.2.5",
-        "symfony/var-dumper": "~3.3",
-        "symfony/yaml": "~2.8|~3.0",
-        "symfony/expression-language": "~2.8|~3.0",
+        "symfony/translation": "~2.8|~3.0|~4.0.0",
+        "symfony/twig-bundle": "~2.8|~3.0|~4.0.0",
+        "symfony/twig-bridge": "~2.8|~3.0|~4.0.0",
+        "symfony/process": "~2.8|~3.0|~4.0.0",
+        "symfony/validator": "^3.2.5|~4.0.0",
+        "symfony/var-dumper": "~3.3|~4.0.0",
+        "symfony/yaml": "~2.8|~3.0|~4.0.0",
+        "symfony/expression-language": "~2.8|~3.0|~4.0.0",
         "doctrine/doctrine-bundle": "~1.4",
         "twig/twig": "~1.28|~2.0"
     },
diff --git a/src/Symfony/Bundle/TwigBundle/composer.json b/src/Symfony/Bundle/TwigBundle/composer.json
index 98d93bb4d79b0..ece1c9160212b 100644
--- a/src/Symfony/Bundle/TwigBundle/composer.json
+++ b/src/Symfony/Bundle/TwigBundle/composer.json
@@ -24,17 +24,17 @@
         "twig/twig": "^1.32|^2.2"
     },
     "require-dev": {
-        "symfony/asset": "~2.8|~3.0",
-        "symfony/stopwatch": "~2.8|~3.0",
-        "symfony/dependency-injection": "~3.3",
-        "symfony/expression-language": "~2.8|~3.0",
-        "symfony/finder": "~2.8|~3.0",
-        "symfony/form": "~2.8|~3.0",
-        "symfony/routing": "~2.8|~3.0",
-        "symfony/templating": "~2.8|~3.0",
-        "symfony/yaml": "~2.8|~3.0",
-        "symfony/framework-bundle": "^3.2.8",
-        "symfony/web-link": "~3.3",
+        "symfony/asset": "~2.8|~3.0|~4.0.0",
+        "symfony/stopwatch": "~2.8|~3.0|~4.0.0",
+        "symfony/dependency-injection": "~3.3|~4.0.0",
+        "symfony/expression-language": "~2.8|~3.0|~4.0.0",
+        "symfony/finder": "~2.8|~3.0|~4.0.0",
+        "symfony/form": "~2.8|~3.0|~4.0.0",
+        "symfony/routing": "~2.8|~3.0|~4.0.0",
+        "symfony/templating": "~2.8|~3.0|~4.0.0",
+        "symfony/yaml": "~2.8|~3.0|~4.0.0",
+        "symfony/framework-bundle": "^3.2.8|~4.0.0",
+        "symfony/web-link": "~3.3|~4.0.0",
         "doctrine/annotations": "~1.0"
     },
     "conflict": {
diff --git a/src/Symfony/Bundle/WebProfilerBundle/composer.json b/src/Symfony/Bundle/WebProfilerBundle/composer.json
index 151d5d2eee5ae..e1c148baf5912 100644
--- a/src/Symfony/Bundle/WebProfilerBundle/composer.json
+++ b/src/Symfony/Bundle/WebProfilerBundle/composer.json
@@ -17,18 +17,18 @@
     ],
     "require": {
         "php": ">=5.5.9",
-        "symfony/http-kernel": "~3.2",
+        "symfony/http-kernel": "~3.2|~4.0.0",
         "symfony/polyfill-php70": "~1.0",
-        "symfony/routing": "~2.8|~3.0",
-        "symfony/twig-bridge": "~2.8|~3.0",
+        "symfony/routing": "~2.8|~3.0|~4.0.0",
+        "symfony/twig-bridge": "~2.8|~3.0|~4.0.0",
         "twig/twig": "~1.28|~2.0",
-        "symfony/var-dumper": "~3.3"
+        "symfony/var-dumper": "~3.3|~4.0.0"
     },
     "require-dev": {
-        "symfony/config": "~2.8|~3.0",
-        "symfony/console": "~2.8|~3.0",
-        "symfony/dependency-injection": "~3.3",
-        "symfony/stopwatch": "~2.8|~3.0"
+        "symfony/config": "~2.8|~3.0|~4.0.0",
+        "symfony/console": "~2.8|~3.0|~4.0.0",
+        "symfony/dependency-injection": "~3.3|~4.0.0",
+        "symfony/stopwatch": "~2.8|~3.0|~4.0.0"
     },
     "conflict": {
         "symfony/dependency-injection": "<3.3",
diff --git a/src/Symfony/Bundle/WebServerBundle/composer.json b/src/Symfony/Bundle/WebServerBundle/composer.json
index 95e4968da69f5..cf6222295c8a0 100644
--- a/src/Symfony/Bundle/WebServerBundle/composer.json
+++ b/src/Symfony/Bundle/WebServerBundle/composer.json
@@ -17,9 +17,9 @@
     ],
     "require": {
         "php": ">=5.5.9",
-        "symfony/console": "~2.8.8|~3.0.8|~3.1.2|~3.2",
-        "symfony/http-kernel": "~2.8|~3.0",
-        "symfony/process": "~2.8|~3.0"
+        "symfony/console": "~2.8.8|~3.0.8|~3.1.2|~3.2|~4.0.0",
+        "symfony/http-kernel": "~2.8|~3.0|~4.0.0",
+        "symfony/process": "~2.8|~3.0|~4.0.0"
     },
     "autoload": {
         "psr-4": { "Symfony\\Bundle\\WebServerBundle\\": "" },
diff --git a/src/Symfony/Component/Asset/composer.json b/src/Symfony/Component/Asset/composer.json
index 01e0031216229..ffdb80b0d45d3 100644
--- a/src/Symfony/Component/Asset/composer.json
+++ b/src/Symfony/Component/Asset/composer.json
@@ -22,8 +22,8 @@
         "symfony/http-foundation": ""
     },
     "require-dev": {
-        "symfony/http-foundation": "~2.8|~3.0",
-        "symfony/http-kernel": "~2.8|~3.0"
+        "symfony/http-foundation": "~2.8|~3.0|~4.0.0",
+        "symfony/http-kernel": "~2.8|~3.0|~4.0.0"
     },
     "autoload": {
         "psr-4": { "Symfony\\Component\\Asset\\": "" },
diff --git a/src/Symfony/Component/BrowserKit/composer.json b/src/Symfony/Component/BrowserKit/composer.json
index e6e07f1a3bff6..6a78ee846b276 100644
--- a/src/Symfony/Component/BrowserKit/composer.json
+++ b/src/Symfony/Component/BrowserKit/composer.json
@@ -17,11 +17,11 @@
     ],
     "require": {
         "php": ">=5.5.9",
-        "symfony/dom-crawler": "~2.8|~3.0"
+        "symfony/dom-crawler": "~2.8|~3.0|~4.0.0"
     },
     "require-dev": {
-        "symfony/process": "~2.8|~3.0",
-        "symfony/css-selector": "~2.8|~3.0"
+        "symfony/process": "~2.8|~3.0|~4.0.0",
+        "symfony/css-selector": "~2.8|~3.0|~4.0.0"
     },
     "suggest": {
         "symfony/process": ""
diff --git a/src/Symfony/Component/ClassLoader/composer.json b/src/Symfony/Component/ClassLoader/composer.json
index ebed7026fcade..690032cbccc9b 100644
--- a/src/Symfony/Component/ClassLoader/composer.json
+++ b/src/Symfony/Component/ClassLoader/composer.json
@@ -20,7 +20,7 @@
         "php": ">=5.5.9"
     },
     "require-dev": {
-        "symfony/finder": "~2.8|~3.0",
+        "symfony/finder": "~2.8|~3.0|~4.0.0",
         "symfony/polyfill-apcu": "~1.1"
     },
     "suggest": {
diff --git a/src/Symfony/Component/Config/composer.json b/src/Symfony/Component/Config/composer.json
index 407bc1eadbd00..5ba594cb34afc 100644
--- a/src/Symfony/Component/Config/composer.json
+++ b/src/Symfony/Component/Config/composer.json
@@ -17,11 +17,11 @@
     ],
     "require": {
         "php": ">=5.5.9",
-        "symfony/filesystem": "~2.8|~3.0"
+        "symfony/filesystem": "~2.8|~3.0|~4.0.0"
     },
     "require-dev": {
-        "symfony/yaml": "~3.0",
-        "symfony/dependency-injection": "~3.3"
+        "symfony/yaml": "~3.0|~4.0.0",
+        "symfony/dependency-injection": "~3.3|~4.0.0"
     },
     "conflict": {
         "symfony/dependency-injection": "<3.3"
diff --git a/src/Symfony/Component/Console/composer.json b/src/Symfony/Component/Console/composer.json
index 9849b7b54ac4e..97cf6ae90b015 100644
--- a/src/Symfony/Component/Console/composer.json
+++ b/src/Symfony/Component/Console/composer.json
@@ -18,14 +18,14 @@
     "require": {
         "php": ">=5.5.9",
         "symfony/polyfill-mbstring": "~1.0",
-        "symfony/debug": "~2.8|~3.0"
+        "symfony/debug": "~2.8|~3.0|~4.0.0"
     },
     "require-dev": {
-        "symfony/http-kernel": "~2.8|~3.0",
-        "symfony/event-dispatcher": "~2.8|~3.0",
-        "symfony/dependency-injection": "~3.3",
-        "symfony/filesystem": "~2.8|~3.0",
-        "symfony/process": "~2.8|~3.0",
+        "symfony/http-kernel": "~2.8|~3.0|~4.0.0",
+        "symfony/event-dispatcher": "~2.8|~3.0|~4.0.0",
+        "symfony/dependency-injection": "~3.3|~4.0.0",
+        "symfony/filesystem": "~2.8|~3.0|~4.0.0",
+        "symfony/process": "~2.8|~3.0|~4.0.0",
         "psr/log": "~1.0"
     },
     "suggest": {
diff --git a/src/Symfony/Component/Debug/composer.json b/src/Symfony/Component/Debug/composer.json
index a9e58086d67d9..3fb492be41821 100644
--- a/src/Symfony/Component/Debug/composer.json
+++ b/src/Symfony/Component/Debug/composer.json
@@ -23,7 +23,7 @@
         "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|~4.0.0"
     },
     "autoload": {
         "psr-4": { "Symfony\\Component\\Debug\\": "" },
diff --git a/src/Symfony/Component/DependencyInjection/composer.json b/src/Symfony/Component/DependencyInjection/composer.json
index 7269eeb65c7ca..a682bfd007015 100644
--- a/src/Symfony/Component/DependencyInjection/composer.json
+++ b/src/Symfony/Component/DependencyInjection/composer.json
@@ -20,9 +20,9 @@
         "psr/container": "^1.0"
     },
     "require-dev": {
-        "symfony/yaml": "~3.3",
-        "symfony/config": "~3.3",
-        "symfony/expression-language": "~2.8|~3.0"
+        "symfony/yaml": "~3.3|~4.0.0",
+        "symfony/config": "~3.3|~4.0.0",
+        "symfony/expression-language": "~2.8|~3.0|~4.0.0"
     },
     "suggest": {
         "symfony/yaml": "",
diff --git a/src/Symfony/Component/DomCrawler/composer.json b/src/Symfony/Component/DomCrawler/composer.json
index bad9b5a7633e7..dce2585d70506 100644
--- a/src/Symfony/Component/DomCrawler/composer.json
+++ b/src/Symfony/Component/DomCrawler/composer.json
@@ -20,7 +20,7 @@
         "symfony/polyfill-mbstring": "~1.0"
     },
     "require-dev": {
-        "symfony/css-selector": "~2.8|~3.0"
+        "symfony/css-selector": "~2.8|~3.0|~4.0.0"
     },
     "suggest": {
         "symfony/css-selector": ""
diff --git a/src/Symfony/Component/Dotenv/composer.json b/src/Symfony/Component/Dotenv/composer.json
index 99998756b7ecb..48210c7bc3bca 100644
--- a/src/Symfony/Component/Dotenv/composer.json
+++ b/src/Symfony/Component/Dotenv/composer.json
@@ -19,7 +19,7 @@
         "php": ">=5.5.9"
     },
     "require-dev": {
-        "symfony/process": "^3.2"
+        "symfony/process": "~3.2|~4.0.0"
     },
     "autoload": {
         "psr-4": { "Symfony\\Component\\Dotenv\\": "" },
diff --git a/src/Symfony/Component/EventDispatcher/composer.json b/src/Symfony/Component/EventDispatcher/composer.json
index 3c56010c0dbd5..c9fb559fb6ec8 100644
--- a/src/Symfony/Component/EventDispatcher/composer.json
+++ b/src/Symfony/Component/EventDispatcher/composer.json
@@ -19,10 +19,10 @@
         "php": ">=5.5.9"
     },
     "require-dev": {
-        "symfony/dependency-injection": "~3.3",
-        "symfony/expression-language": "~2.8|~3.0",
-        "symfony/config": "~2.8|~3.0",
-        "symfony/stopwatch": "~2.8|~3.0",
+        "symfony/dependency-injection": "~3.3|~4.0.0",
+        "symfony/expression-language": "~2.8|~3.0|~4.0.0",
+        "symfony/config": "~2.8|~3.0|~4.0.0",
+        "symfony/stopwatch": "~2.8|~3.0|~4.0.0",
         "psr/log": "~1.0"
     },
     "conflict": {
diff --git a/src/Symfony/Component/ExpressionLanguage/composer.json b/src/Symfony/Component/ExpressionLanguage/composer.json
index e0298e4c749c3..ffa6c0bc21212 100644
--- a/src/Symfony/Component/ExpressionLanguage/composer.json
+++ b/src/Symfony/Component/ExpressionLanguage/composer.json
@@ -17,7 +17,7 @@
     ],
     "require": {
         "php": ">=5.5.9",
-        "symfony/cache": "~3.1"
+        "symfony/cache": "~3.1|~4.0.0"
     },
     "autoload": {
         "psr-4": { "Symfony\\Component\\ExpressionLanguage\\": "" },
diff --git a/src/Symfony/Component/Form/composer.json b/src/Symfony/Component/Form/composer.json
index 4bd2b395ddbfe..edd32cc9ed85a 100644
--- a/src/Symfony/Component/Form/composer.json
+++ b/src/Symfony/Component/Form/composer.json
@@ -17,22 +17,22 @@
     ],
     "require": {
         "php": ">=5.5.9",
-        "symfony/event-dispatcher": "~2.8|~3.0",
-        "symfony/intl": "^2.8.18|^3.2.5",
-        "symfony/options-resolver": "~2.8|~3.0",
+        "symfony/event-dispatcher": "~2.8|~3.0|~4.0.0",
+        "symfony/intl": "^2.8.18|^3.2.5|~4.0.0",
+        "symfony/options-resolver": "~2.8|~3.0|~4.0.0",
         "symfony/polyfill-mbstring": "~1.0",
-        "symfony/property-access": "~2.8|~3.0"
+        "symfony/property-access": "~2.8|~3.0|~4.0.0"
     },
     "require-dev": {
         "doctrine/collections": "~1.0",
-        "symfony/validator": "^2.8.18|^3.2.5",
-        "symfony/dependency-injection": "~3.3",
-        "symfony/config": "~2.7|~3.0",
-        "symfony/http-foundation": "~2.8|~3.0",
-        "symfony/http-kernel": "~2.8|~3.0",
-        "symfony/security-csrf": "~2.8|~3.0",
-        "symfony/translation": "~2.8|~3.0",
-        "symfony/var-dumper": "~3.3"
+        "symfony/validator": "^2.8.18|^3.2.5|~4.0.0",
+        "symfony/dependency-injection": "~3.3|~4.0.0",
+        "symfony/config": "~2.7|~3.0|~4.0.0",
+        "symfony/http-foundation": "~2.8|~3.0|~4.0.0",
+        "symfony/http-kernel": "~2.8|~3.0|~4.0.0",
+        "symfony/security-csrf": "~2.8|~3.0|~4.0.0",
+        "symfony/translation": "~2.8|~3.0|~4.0.0",
+        "symfony/var-dumper": "~3.3|~4.0.0"
     },
     "conflict": {
         "phpunit/phpunit": "<4.8.35|<5.4.3,>=5.0",
diff --git a/src/Symfony/Component/HttpFoundation/composer.json b/src/Symfony/Component/HttpFoundation/composer.json
index adf85e0fe5245..7e0994993fe3c 100644
--- a/src/Symfony/Component/HttpFoundation/composer.json
+++ b/src/Symfony/Component/HttpFoundation/composer.json
@@ -20,7 +20,7 @@
         "symfony/polyfill-mbstring": "~1.1"
     },
     "require-dev": {
-        "symfony/expression-language": "~2.8|~3.0"
+        "symfony/expression-language": "~2.8|~3.0|~4.0.0"
     },
     "autoload": {
         "psr-4": { "Symfony\\Component\\HttpFoundation\\": "" },
diff --git a/src/Symfony/Component/HttpKernel/composer.json b/src/Symfony/Component/HttpKernel/composer.json
index c17a00950c638..fd5938b3b361f 100644
--- a/src/Symfony/Component/HttpKernel/composer.json
+++ b/src/Symfony/Component/HttpKernel/composer.json
@@ -17,27 +17,27 @@
     ],
     "require": {
         "php": ">=5.5.9",
-        "symfony/event-dispatcher": "~2.8|~3.0",
-        "symfony/http-foundation": "~3.3",
-        "symfony/debug": "~2.8|~3.0",
+        "symfony/event-dispatcher": "~2.8|~3.0|~4.0.0",
+        "symfony/http-foundation": "~3.3|~4.0.0",
+        "symfony/debug": "~2.8|~3.0|~4.0.0",
         "psr/log": "~1.0"
     },
     "require-dev": {
-        "symfony/browser-kit": "~2.8|~3.0",
+        "symfony/browser-kit": "~2.8|~3.0|~4.0.0",
         "symfony/class-loader": "~2.8|~3.0",
-        "symfony/config": "~2.8|~3.0",
-        "symfony/console": "~2.8|~3.0",
-        "symfony/css-selector": "~2.8|~3.0",
-        "symfony/dependency-injection": "~3.3",
-        "symfony/dom-crawler": "~2.8|~3.0",
-        "symfony/expression-language": "~2.8|~3.0",
-        "symfony/finder": "~2.8|~3.0",
-        "symfony/process": "~2.8|~3.0",
-        "symfony/routing": "~2.8|~3.0",
-        "symfony/stopwatch": "~2.8|~3.0",
-        "symfony/templating": "~2.8|~3.0",
-        "symfony/translation": "~2.8|~3.0",
-        "symfony/var-dumper": "~3.3",
+        "symfony/config": "~2.8|~3.0|~4.0.0",
+        "symfony/console": "~2.8|~3.0|~4.0.0",
+        "symfony/css-selector": "~2.8|~3.0|~4.0.0",
+        "symfony/dependency-injection": "~3.3|~4.0.0",
+        "symfony/dom-crawler": "~2.8|~3.0|~4.0.0",
+        "symfony/expression-language": "~2.8|~3.0|~4.0.0",
+        "symfony/finder": "~2.8|~3.0|~4.0.0",
+        "symfony/process": "~2.8|~3.0|~4.0.0",
+        "symfony/routing": "~2.8|~3.0|~4.0.0",
+        "symfony/stopwatch": "~2.8|~3.0|~4.0.0",
+        "symfony/templating": "~2.8|~3.0|~4.0.0",
+        "symfony/translation": "~2.8|~3.0|~4.0.0",
+        "symfony/var-dumper": "~3.3|~4.0.0",
         "psr/cache": "~1.0"
     },
     "conflict": {
@@ -47,7 +47,6 @@
     },
     "suggest": {
         "symfony/browser-kit": "",
-        "symfony/class-loader": "",
         "symfony/config": "",
         "symfony/console": "",
         "symfony/dependency-injection": "",
diff --git a/src/Symfony/Component/Intl/composer.json b/src/Symfony/Component/Intl/composer.json
index 87c34b5f54ee5..9bc914765c240 100644
--- a/src/Symfony/Component/Intl/composer.json
+++ b/src/Symfony/Component/Intl/composer.json
@@ -28,7 +28,7 @@
         "symfony/polyfill-intl-icu": "~1.0"
     },
     "require-dev": {
-        "symfony/filesystem": "~2.8|~3.0"
+        "symfony/filesystem": "~2.8|~3.0|~4.0.0"
     },
     "suggest": {
         "ext-intl": "to use the component with locales other than \"en\""
diff --git a/src/Symfony/Component/Ldap/composer.json b/src/Symfony/Component/Ldap/composer.json
index dbb5fbdd35af7..886cb502a0dd6 100644
--- a/src/Symfony/Component/Ldap/composer.json
+++ b/src/Symfony/Component/Ldap/composer.json
@@ -18,7 +18,7 @@
     "require": {
         "php": ">=5.5.9",
         "symfony/polyfill-php56": "~1.0",
-        "symfony/options-resolver": "~2.8|~3.0",
+        "symfony/options-resolver": "~2.8|~3.0|~4.0.0",
         "ext-ldap": "*"
     },
     "autoload": {
diff --git a/src/Symfony/Component/PropertyAccess/composer.json b/src/Symfony/Component/PropertyAccess/composer.json
index 2d0347cbcea84..b2dbedb1af9ac 100644
--- a/src/Symfony/Component/PropertyAccess/composer.json
+++ b/src/Symfony/Component/PropertyAccess/composer.json
@@ -18,10 +18,10 @@
     "require": {
         "php": ">=5.5.9",
         "symfony/polyfill-php70": "~1.0",
-        "symfony/inflector": "~3.1"
+        "symfony/inflector": "~3.1|~4.0.0"
     },
     "require-dev": {
-        "symfony/cache": "~3.1"
+        "symfony/cache": "~3.1|~4.0.0"
     },
     "suggest": {
         "psr/cache-implementation": "To cache access methods."
diff --git a/src/Symfony/Component/PropertyInfo/composer.json b/src/Symfony/Component/PropertyInfo/composer.json
index 9f1956a3cd6b1..508b308daebf5 100644
--- a/src/Symfony/Component/PropertyInfo/composer.json
+++ b/src/Symfony/Component/PropertyInfo/composer.json
@@ -24,12 +24,12 @@
     ],
     "require": {
         "php": ">=5.5.9",
-        "symfony/inflector": "~3.1"
+        "symfony/inflector": "~3.1|~4.0.0"
     },
     "require-dev": {
-        "symfony/serializer": "~2.8|~3.0",
-        "symfony/cache": "~3.1",
-        "symfony/dependency-injection": "~3.3",
+        "symfony/serializer": "~2.8|~3.0|~4.0.0",
+        "symfony/cache": "~3.1|~4.0.0",
+        "symfony/dependency-injection": "~3.3|~4.0.0",
         "phpdocumentor/reflection-docblock": "^3.0",
         "doctrine/annotations": "~1.0"
     },
diff --git a/src/Symfony/Component/Routing/composer.json b/src/Symfony/Component/Routing/composer.json
index e92517755581e..a9f192cd120a0 100644
--- a/src/Symfony/Component/Routing/composer.json
+++ b/src/Symfony/Component/Routing/composer.json
@@ -19,11 +19,11 @@
         "php": ">=5.5.9"
     },
     "require-dev": {
-        "symfony/config": "~2.8|~3.0",
-        "symfony/http-foundation": "~2.8|~3.0",
-        "symfony/yaml": "~3.3",
-        "symfony/expression-language": "~2.8|~3.0",
-        "symfony/dependency-injection": "~3.3",
+        "symfony/config": "~2.8|~3.0|~4.0.0",
+        "symfony/http-foundation": "~2.8|~3.0|~4.0.0",
+        "symfony/yaml": "~3.3|~4.0.0",
+        "symfony/expression-language": "~2.8|~3.0|~4.0.0",
+        "symfony/dependency-injection": "~3.3|~4.0.0",
         "doctrine/annotations": "~1.0",
         "doctrine/common": "~2.2",
         "psr/log": "~1.0"
diff --git a/src/Symfony/Component/Security/Core/composer.json b/src/Symfony/Component/Security/Core/composer.json
index 8db108b3642f7..81fa15414c953 100644
--- a/src/Symfony/Component/Security/Core/composer.json
+++ b/src/Symfony/Component/Security/Core/composer.json
@@ -20,11 +20,11 @@
         "symfony/polyfill-php56": "~1.0"
     },
     "require-dev": {
-        "symfony/event-dispatcher": "~2.8|~3.0",
-        "symfony/expression-language": "~2.8|~3.0",
-        "symfony/http-foundation": "~2.8|~3.0",
-        "symfony/ldap": "~3.1",
-        "symfony/validator": "^2.8.18|^3.2.5",
+        "symfony/event-dispatcher": "~2.8|~3.0|~4.0.0",
+        "symfony/expression-language": "~2.8|~3.0|~4.0.0",
+        "symfony/http-foundation": "~2.8|~3.0|~4.0.0",
+        "symfony/ldap": "~3.1|~4.0.0",
+        "symfony/validator": "^2.8.18|^3.2.5|~4.0.0",
         "psr/log": "~1.0"
     },
     "suggest": {
diff --git a/src/Symfony/Component/Security/Csrf/composer.json b/src/Symfony/Component/Security/Csrf/composer.json
index d360eefba2b8f..f23354377dbd8 100644
--- a/src/Symfony/Component/Security/Csrf/composer.json
+++ b/src/Symfony/Component/Security/Csrf/composer.json
@@ -19,10 +19,10 @@
         "php": ">=5.5.9",
         "symfony/polyfill-php56": "~1.0",
         "symfony/polyfill-php70": "~1.0",
-        "symfony/security-core": "~2.8|~3.0"
+        "symfony/security-core": "~2.8|~3.0|~4.0.0"
     },
     "require-dev": {
-        "symfony/http-foundation": "~2.8|~3.0"
+        "symfony/http-foundation": "~2.8|~3.0|~4.0.0"
     },
     "suggest": {
         "symfony/http-foundation": "For using the class SessionTokenStorage."
diff --git a/src/Symfony/Component/Security/Guard/composer.json b/src/Symfony/Component/Security/Guard/composer.json
index 9789ef59f8055..07d29f4df50f5 100644
--- a/src/Symfony/Component/Security/Guard/composer.json
+++ b/src/Symfony/Component/Security/Guard/composer.json
@@ -17,8 +17,8 @@
     ],
     "require": {
         "php": ">=5.5.9",
-        "symfony/security-core": "~2.8|~3.0",
-        "symfony/security-http": "~3.1"
+        "symfony/security-core": "~2.8|~3.0|~4.0.0",
+        "symfony/security-http": "~3.1|~4.0.0"
     },
     "require-dev": {
         "psr/log": "~1.0"
diff --git a/src/Symfony/Component/Security/Http/composer.json b/src/Symfony/Component/Security/Http/composer.json
index 61643f4642167..fc9aeec1d4d62 100644
--- a/src/Symfony/Component/Security/Http/composer.json
+++ b/src/Symfony/Component/Security/Http/composer.json
@@ -17,17 +17,17 @@
     ],
     "require": {
         "php": ">=5.5.9",
-        "symfony/security-core": "~3.2",
-        "symfony/event-dispatcher": "~2.8|~3.0",
-        "symfony/http-foundation": "~2.8|~3.0",
-        "symfony/http-kernel": "~3.3",
+        "symfony/security-core": "~3.2|~4.0.0",
+        "symfony/event-dispatcher": "~2.8|~3.0|~4.0.0",
+        "symfony/http-foundation": "~2.8|~3.0|~4.0.0",
+        "symfony/http-kernel": "~3.3|~4.0.0",
         "symfony/polyfill-php56": "~1.0",
         "symfony/polyfill-php70": "~1.0",
-        "symfony/property-access": "~2.8|~3.0"
+        "symfony/property-access": "~2.8|~3.0|~4.0.0"
     },
     "require-dev": {
-        "symfony/routing": "~2.8|~3.0",
-        "symfony/security-csrf": "~2.8|~3.0",
+        "symfony/routing": "~2.8|~3.0|~4.0.0",
+        "symfony/security-csrf": "~2.8|~3.0|~4.0.0",
         "psr/log": "~1.0"
     },
     "suggest": {
diff --git a/src/Symfony/Component/Security/composer.json b/src/Symfony/Component/Security/composer.json
index 202ee891ea3c8..a0b91b459a584 100644
--- a/src/Symfony/Component/Security/composer.json
+++ b/src/Symfony/Component/Security/composer.json
@@ -17,13 +17,13 @@
     ],
     "require": {
         "php": ">=5.5.9",
-        "symfony/event-dispatcher": "~2.8|~3.0",
-        "symfony/http-foundation": "~2.8|~3.0",
-        "symfony/http-kernel": "~3.3",
+        "symfony/event-dispatcher": "~2.8|~3.0|~4.0.0",
+        "symfony/http-foundation": "~2.8|~3.0|~4.0.0",
+        "symfony/http-kernel": "~3.3|~4.0.0",
         "symfony/polyfill-php56": "~1.0",
         "symfony/polyfill-php70": "~1.0",
         "symfony/polyfill-util": "~1.0",
-        "symfony/property-access": "~2.8|~3.0"
+        "symfony/property-access": "~2.8|~3.0|~4.0.0"
     },
     "replace": {
         "symfony/security-core": "self.version",
@@ -32,12 +32,12 @@
         "symfony/security-http": "self.version"
     },
     "require-dev": {
-        "symfony/finder": "~2.8|~3.0",
+        "symfony/finder": "~2.8|~3.0|~4.0.0",
         "symfony/polyfill-intl-icu": "~1.0",
-        "symfony/routing": "~2.8|~3.0",
-        "symfony/validator": "^2.8.18|^3.2.5",
-        "symfony/expression-language": "~2.8|~3.0",
-        "symfony/ldap": "~3.1",
+        "symfony/routing": "~2.8|~3.0|~4.0.0",
+        "symfony/validator": "^2.8.18|^3.2.5|~4.0.0",
+        "symfony/expression-language": "~2.8|~3.0|~4.0.0",
+        "symfony/ldap": "~3.1|~4.0.0",
         "psr/log": "~1.0"
     },
     "suggest": {
diff --git a/src/Symfony/Component/Serializer/composer.json b/src/Symfony/Component/Serializer/composer.json
index 6ca2534f24109..fac63187e1344 100644
--- a/src/Symfony/Component/Serializer/composer.json
+++ b/src/Symfony/Component/Serializer/composer.json
@@ -19,14 +19,14 @@
         "php": ">=5.5.9"
     },
     "require-dev": {
-        "symfony/yaml": "~3.3",
-        "symfony/config": "~2.8|~3.0",
-        "symfony/property-access": "~2.8|~3.0",
-        "symfony/http-foundation": "~2.8|~3.0",
-        "symfony/cache": "~3.1",
-        "symfony/property-info": "~3.1",
+        "symfony/yaml": "~3.3|~4.0.0",
+        "symfony/config": "~2.8|~3.0|~4.0.0",
+        "symfony/property-access": "~2.8|~3.0|~4.0.0",
+        "symfony/http-foundation": "~2.8|~3.0|~4.0.0",
+        "symfony/cache": "~3.1|~4.0.0",
+        "symfony/property-info": "~3.1|~4.0.0",
         "doctrine/annotations": "~1.0",
-        "symfony/dependency-injection": "~3.2",
+        "symfony/dependency-injection": "~3.2|~4.0.0",
         "doctrine/cache": "~1.0",
         "phpdocumentor/reflection-docblock": "~3.0"
     },
diff --git a/src/Symfony/Component/Translation/composer.json b/src/Symfony/Component/Translation/composer.json
index c6036de40efb9..966c41f23af39 100644
--- a/src/Symfony/Component/Translation/composer.json
+++ b/src/Symfony/Component/Translation/composer.json
@@ -20,9 +20,9 @@
         "symfony/polyfill-mbstring": "~1.0"
     },
     "require-dev": {
-        "symfony/config": "~2.8|~3.0",
-        "symfony/intl": "^2.8.18|^3.2.5",
-        "symfony/yaml": "~3.3",
+        "symfony/config": "~2.8|~3.0|~4.0.0",
+        "symfony/intl": "^2.8.18|^3.2.5|~4.0.0",
+        "symfony/yaml": "~3.3|~4.0.0",
         "psr/log": "~1.0"
     },
     "conflict": {
diff --git a/src/Symfony/Component/Validator/composer.json b/src/Symfony/Component/Validator/composer.json
index 76fa66ef68108..ff44ba9126f60 100644
--- a/src/Symfony/Component/Validator/composer.json
+++ b/src/Symfony/Component/Validator/composer.json
@@ -18,16 +18,16 @@
     "require": {
         "php": ">=5.5.9",
         "symfony/polyfill-mbstring": "~1.0",
-        "symfony/translation": "~2.8|~3.0"
+        "symfony/translation": "~2.8|~3.0|~4.0.0"
     },
     "require-dev": {
-        "symfony/http-foundation": "~2.8|~3.0",
-        "symfony/intl": "^2.8.18|^3.2.5",
-        "symfony/yaml": "~3.3",
-        "symfony/config": "~2.8|~3.0",
-        "symfony/dependency-injection": "~3.3",
-        "symfony/expression-language": "~2.8|~3.0",
-        "symfony/cache": "~3.1",
+        "symfony/http-foundation": "~2.8|~3.0|~4.0.0",
+        "symfony/intl": "^2.8.18|^3.2.5|~4.0.0",
+        "symfony/yaml": "~3.3|~4.0.0",
+        "symfony/config": "~2.8|~3.0|~4.0.0",
+        "symfony/dependency-injection": "~3.3|~4.0.0",
+        "symfony/expression-language": "~2.8|~3.0|~4.0.0",
+        "symfony/cache": "~3.1|~4.0.0",
         "doctrine/annotations": "~1.0",
         "doctrine/cache": "~1.0",
         "egulias/email-validator": "^1.2.8|~2.0"
diff --git a/src/Symfony/Component/WebLink/composer.json b/src/Symfony/Component/WebLink/composer.json
index b5bb071ae095c..8db660c676e14 100644
--- a/src/Symfony/Component/WebLink/composer.json
+++ b/src/Symfony/Component/WebLink/composer.json
@@ -24,9 +24,9 @@
         "symfony/http-kernel": ""
     },
     "require-dev": {
-        "symfony/event-dispatcher": "^2.8|^3.0",
-        "symfony/http-foundation": "^2.8|^3.0",
-        "symfony/http-kernel": "^2.8|^3.0"
+        "symfony/event-dispatcher": "^2.8|^3.0|~4.0.0",
+        "symfony/http-foundation": "^2.8|^3.0|~4.0.0",
+        "symfony/http-kernel": "^2.8|^3.0|~4.0.0"
     },
     "autoload": {
         "psr-4": { "Symfony\\Component\\WebLink\\": "" },
diff --git a/src/Symfony/Component/Workflow/composer.json b/src/Symfony/Component/Workflow/composer.json
index 0bbfdf660e901..918bda4b99801 100644
--- a/src/Symfony/Component/Workflow/composer.json
+++ b/src/Symfony/Component/Workflow/composer.json
@@ -21,14 +21,14 @@
     ],
     "require": {
         "php": ">=5.5.9",
-        "symfony/property-access": "~2.3|~3.0"
+        "symfony/property-access": "~2.3|~3.0|~4.0.0"
     },
     "require-dev": {
         "psr/log": "~1.0",
-        "symfony/dependency-injection": "~2.8|~3.0",
-        "symfony/event-dispatcher": "~2.1|~3.0",
-        "symfony/expression-language": "~2.8|~3.0",
-        "symfony/security-core": "~2.8|~3.0"
+        "symfony/dependency-injection": "~2.8|~3.0|~4.0.0",
+        "symfony/event-dispatcher": "~2.1|~3.0|~4.0.0",
+        "symfony/expression-language": "~2.8|~3.0|~4.0.0",
+        "symfony/security-core": "~2.8|~3.0|~4.0.0"
     },
     "autoload": {
         "psr-4": { "Symfony\\Component\\Workflow\\": "" }
diff --git a/src/Symfony/Component/Yaml/composer.json b/src/Symfony/Component/Yaml/composer.json
index d1272b3ce6139..8c218ac9ac35c 100644
--- a/src/Symfony/Component/Yaml/composer.json
+++ b/src/Symfony/Component/Yaml/composer.json
@@ -19,7 +19,7 @@
         "php": ">=5.5.9"
     },
     "require-dev": {
-        "symfony/console": "~2.8|~3.0"
+        "symfony/console": "~2.8|~3.0|~4.0.0"
     },
     "suggest": {
         "symfony/console": "For validating YAML files using the lint command"