diff --git a/composer.json b/composer.json
index 3b89b0de..db910f89 100644
--- a/composer.json
+++ b/composer.json
@@ -48,6 +48,9 @@
 			"phpstan/extension-installer": true,
 			"automattic/jetpack-autoloader": true
 		},
+		"platform": {
+			"php": "8.2"
+		},
 		"wp-slug": "pronamic-pay-core"
 	},
 	"repositories": [