diff --git a/composer.json b/composer.json
index 3521ad2577f86074d85ac2ad969018074e5beb3a..062bfbea59745d03f6689796441683ad776356f5 100644
--- a/composer.json
+++ b/composer.json
@@ -26,7 +26,7 @@
     "sort-packages": true
   },
   "require": {
-    "php": "^7.1",
+    "php": "^7.3",
     "beberlei/assert": "*"
   },
   "require-dev": {