diff --git a/composer.json b/composer.json
index 0935075..a04df60 100644
--- a/composer.json
+++ b/composer.json
@@ -18,12 +18,12 @@
 		}
 	],
 	"require": {
-		"php": ">=5.3.0"
+		"php": ">=7.4"
 	},
 	"autoload": {
  		"psr-4": { "Michelf\\": "Michelf/" }
 	},
 	"require-dev": {
-		"phpunit/phpunit": ">=4.3 <5.8"
+		"phpunit/phpunit": "^9.5"
 	}
 }