diff --git a/composer.json b/composer.json
index 9d0bd8a..d04be4e 100644
--- a/composer.json
+++ b/composer.json
@@ -37,6 +37,10 @@
 			"phpstan/extension-installer": true,
 			"automattic/jetpack-autoloader": true
 		},
+		"platform": {
+			"php": "8.1"
+		},
+		"platform-check": false,
 		"sort-packages": true,
 		"wp-slug": "pronamic-pay-gravity-forms"
 	},
@@ -58,7 +62,7 @@
 		}
 	},
 	"require": {
-		"php": ">=8.0",
+		"php": ">=8.1",
 		"automattic/jetpack-autoloader": "^3.0",
 		"composer/installers": "^2.2",
 		"pronamic/wp-datetime": "^2.1",