diff --git a/.github/workflows/phpunit.yml b/.github/workflows/phpunit.yml
index 202aaf6..4d3319d 100644
--- a/.github/workflows/phpunit.yml
+++ b/.github/workflows/phpunit.yml
@@ -14,7 +14,7 @@ jobs:
 
         strategy:
             matrix:
-                php: ['7.3', '7.4', '8.0']
+                php: ['7.4', '8.0', '8.1']
 
         steps:
             -   name: Checkout
diff --git a/composer.json b/composer.json
index 1571ffe..1cbf1ca 100644
--- a/composer.json
+++ b/composer.json
@@ -31,7 +31,7 @@
         }
     ],
     "require": {
-        "php": ">=7.3"
+        "php": ">=7.4"
     },
     "require-dev": {
         "ext-dom": "*",