diff --git a/composer.json b/composer.json
index 2c0142d..afe2d97 100644
--- a/composer.json
+++ b/composer.json
@@ -17,7 +17,7 @@
   ],
   "license": "MIT",
   "require": {
-    "php": "^7.1",
+    "php": ">=7.1",
     "jms/serializer": "^1.2|^2.0|^3.0",
     "symfony/yaml": "^2.2|^3.0|^4.0|^5.0"
   },