diff --git a/framework/core/composer.json b/framework/core/composer.json
index 0b66442ba..4f4abf887 100644
--- a/framework/core/composer.json
+++ b/framework/core/composer.json
@@ -76,11 +76,11 @@
         "psr/http-server-handler": "^1.0",
         "psr/http-server-middleware": "^1.0",
         "s9e/text-formatter": "^2.3.6",
-        "symfony/config": "^3.3",
-        "symfony/console": "^4.2",
-        "symfony/event-dispatcher": "^4.3.2",
-        "symfony/translation": "^3.3",
-        "symfony/yaml": "^3.3",
+        "symfony/config": "^4.3.4",
+        "symfony/console": "^4.3.4",
+        "symfony/event-dispatcher": "^4.3.4",
+        "symfony/translation": "^4.3.4",
+        "symfony/yaml": "^4.3.4",
         "tobscure/json-api": "^0.3.0",
         "wikimedia/less.php": "^3.0"
     },