diff --git a/composer.json b/composer.json
index 34d7c762..a8a56daa 100644
--- a/composer.json
+++ b/composer.json
@@ -12,7 +12,7 @@
 	"require": {
 		"php": ">=7.1",
 		"composer-plugin-api": "^1.1 || ^2.0",
-		"symfony/yaml": "~5.4.3"
+		"symfony/yaml": "~5.4.21"
 	},
 	"extra": {
 		"class": "Altis\\Local_Server\\Composer\\Plugin",