diff --git a/composer.json b/composer.json
index 884eee1..070e046 100644
--- a/composer.json
+++ b/composer.json
@@ -14,6 +14,6 @@
     }
   ],
   "require": {
-    "php": ">=5.4.0"
+    "php": ">=7.1.0"
   }
 }