diff --git a/README.md b/README.md
index a67d9da..47032bb 100644
--- a/README.md
+++ b/README.md
@@ -156,3 +156,6 @@ It uses [SimplePie](https://github.com/simplepie/simplepie) for RSS handling, [P
 * update PHPMailer to 6.9.1
 * update Symfony/Cache to 6.4.10
 * update dev dependencies
+
+###  Version 0.5.1
+* fix minimal PHP Version, was PHP 8.2 in 0.5.0 instead of 8.1
diff --git a/composer.json b/composer.json
index 663a7a2..ccd40d3 100644
--- a/composer.json
+++ b/composer.json
@@ -16,6 +16,9 @@
     "config": {
         "allow-plugins": {
             "dealerdirect/phpcodesniffer-composer-installer": true
+        },
+        "platform": {
+            "php": "8.1"
         }
     }
 }
diff --git a/composer.lock b/composer.lock
index ab7b83b..c83254a 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": "c857cec9efcba9c902ac11ec187d02b9",
+    "content-hash": "0ef107e3627e71de5194f981485721fb",
     "packages": [
         {
             "name": "phpmailer/phpmailer",
@@ -690,25 +690,26 @@
         },
         {
             "name": "symfony/var-exporter",
-            "version": "v7.1.2",
+            "version": "v6.4.9",
             "source": {
                 "type": "git",
                 "url": "https://github.com/symfony/var-exporter.git",
-                "reference": "b80a669a2264609f07f1667f891dbfca25eba44c"
+                "reference": "f9a060622e0d93777b7f8687ec4860191e16802e"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/symfony/var-exporter/zipball/b80a669a2264609f07f1667f891dbfca25eba44c",
-                "reference": "b80a669a2264609f07f1667f891dbfca25eba44c",
+                "url": "https://api.github.com/repos/symfony/var-exporter/zipball/f9a060622e0d93777b7f8687ec4860191e16802e",
+                "reference": "f9a060622e0d93777b7f8687ec4860191e16802e",
                 "shasum": ""
             },
             "require": {
-                "php": ">=8.2"
+                "php": ">=8.1",
+                "symfony/deprecation-contracts": "^2.5|^3"
             },
             "require-dev": {
                 "symfony/property-access": "^6.4|^7.0",
                 "symfony/serializer": "^6.4|^7.0",
-                "symfony/var-dumper": "^6.4|^7.0"
+                "symfony/var-dumper": "^5.4|^6.0|^7.0"
             },
             "type": "library",
             "autoload": {
@@ -746,7 +747,7 @@
                 "serialize"
             ],
             "support": {
-                "source": "https://github.com/symfony/var-exporter/tree/v7.1.2"
+                "source": "https://github.com/symfony/var-exporter/tree/v6.4.9"
             },
             "funding": [
                 {
@@ -762,7 +763,7 @@
                     "type": "tidelift"
                 }
             ],
-            "time": "2024-06-28T08:00:31+00:00"
+            "time": "2024-06-24T15:53:56+00:00"
         }
     ],
     "packages-dev": [
@@ -1055,5 +1056,8 @@
         "php": "*"
     },
     "platform-dev": [],
+    "platform-overrides": {
+        "php": "8.1"
+    },
     "plugin-api-version": "2.3.0"
 }