diff --git a/composer.json b/composer.json
index 5e8ee45..bc63512 100644
--- a/composer.json
+++ b/composer.json
@@ -16,6 +16,7 @@
         }
     },
     "require": {
+        "php": "^7.4",
         "ext-dom": "*",
         "symfony/polyfill-php80": "^1.20"
     },
diff --git a/composer.lock b/composer.lock
index 8f2f006..e02f67e 100644
--- a/composer.lock
+++ b/composer.lock
@@ -4,7 +4,7 @@
         "Read more about it at https://getcomposer.org/doc/01-basic-usage.md#installing-dependencies",
         "This file is @generated automatically"
     ],
-    "content-hash": "0d0724ff047488163012f6645bdce13d",
+    "content-hash": "b47970b5b9bc1cc8875bb34b663dce82",
     "packages": [
         {
             "name": "symfony/polyfill-php80",
@@ -2357,6 +2357,7 @@
     "prefer-stable": false,
     "prefer-lowest": false,
     "platform": {
+        "php": "^7.4",
         "ext-dom": "*"
     },
     "platform-dev": [],