diff --git a/README.md b/README.md
index fbd4e43..0b5f745 100644
--- a/README.md
+++ b/README.md
@@ -17,7 +17,7 @@ This is a simple PHP library to help you deal with Europe's VAT rules.
 
 ## Installation
 
-[PHP](https://php.net) version 7.3 or higher with the CURL and JSON extension is required.
+[PHP](https://php.net) version 8.1 or higher with the CURL and JSON extension is required.
 
 For VAT number existence checking, the PHP SOAP extension is required as well.
 
diff --git a/composer.json b/composer.json
index d725f37..213ac88 100755
--- a/composer.json
+++ b/composer.json
@@ -10,7 +10,7 @@
     }
   ],
   "require": {
-    "php": ">=7.3",
+    "php": ">=8.1",
     "ext-curl": "*",
     "ext-json": "*"
   },