diff --git a/composer.json b/composer.json
index 42acdf8..d8d54b3 100644
--- a/composer.json
+++ b/composer.json
@@ -4,7 +4,7 @@
     "type": "project",
     "license": "MIT",
     "require": {
-        "php": "^7.3.0",
+        "php": "^7.3.0 || ^8.0",
         "ext-ctype": "*",
         "ext-iconv": "*",
         "composer-runtime-api": "^2",