diff --git a/composer.json b/composer.json
index 5343a1f..9fb65b7 100644
--- a/composer.json
+++ b/composer.json
@@ -9,12 +9,12 @@
         "ext-json": "*",
         "composer/composer": "@stable",
         "composer/semver": "^1.5",
-        "symfony/config": "^3.3||^4.4",
+        "symfony/config": "^3.3||^4.4||^5.1",
         "symfony/console": "^2.6||^4.0",
-        "symfony/dependency-injection": "^3.3||^4.3",
+        "symfony/dependency-injection": "^3.3||^4.3||^5.1",
         "symfony/process": "^2.1||^4.1",
-        "symfony/proxy-manager-bridge": "^3.3||^4.3",
-        "symfony/yaml": "^3.3||^4.0",
+        "symfony/proxy-manager-bridge": "^3.3||^4.3||^5.1",
+        "symfony/yaml": "^3.3||^4.0||^5.1",
         "monolog/monolog": "^1.16"
     },
     "require-dev": {