diff --git a/composer.json b/composer.json
index 5680314f4..8b9168981 100644
--- a/composer.json
+++ b/composer.json
@@ -18,7 +18,7 @@
 		"source": "https://github.com/cakephp/cakephp"
 	},
 	"require": {
-		"php": ">=5.3.0"
+		"php": ">=5.3.0,<8.0.0"
 	},
 	"suggest": {
 		"ext-openssl": "You need to install ext-openssl or ext-mcrypt to use AES-256 encryption",