diff --git a/.travis.yml b/.travis.yml
index 12005fe..c775f17 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -10,6 +10,8 @@ php:
  - '5.6'
  - '7.0'
  - '7.4'
+ - '8.0'
+ - '8.1'
  - hhvm-3.3
  - hhvm-3.6
  - hhvm-3.9
diff --git a/composer.json b/composer.json
index 9454f67..df0516f 100644
--- a/composer.json
+++ b/composer.json
@@ -2,6 +2,9 @@
   "name": "globalcitizen/php-iban",
   "description": "php-iban is a library for parsing and validating IBAN (and IIBAN) bank account information.",
   "license": "LGPL-3.0-only",
+  "require": {
+    "php": "^5.4 || ^5.5 || ^5.6 || ^7.0 || ^7.4 || ^8.0 || ^8.1"
+  },
   "autoload": {
     "files": ["oophp-iban.php","php-iban.php"]
   }