diff --git a/composer.json b/composer.json
index 23886778..ff33b6f6 100644
--- a/composer.json
+++ b/composer.json
@@ -16,7 +16,7 @@
     }
   ],
   "require": {
-    "php": ">=5.5.0",
+    "php": ">=7.0.0",
     "mixstart/mixphp-framework": "1.0.*"
   },
   "autoload": {