diff --git a/composer.json b/composer.json
index 2b77251246accc3511e9cbd0dfc7fa8d96cba2ff..d226ea04919fd5e977c7e78d8e31f105ddf8c0db 100644
--- a/composer.json
+++ b/composer.json
@@ -11,7 +11,7 @@
         }
     ],
     "require": {
-        "php": "^7.0",
+        "php": "^7.1",
         "symfony/serializer": "^3.0|^4.0",
         "paragonie/random_compat": "*"
     },