diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index c9e64c4..92ba61e 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -16,7 +16,7 @@ jobs:
       - name: Set up PHP
         uses: shivammathur/setup-php@v2
         with:
-          php-version: 8.0
+          php-version: 8.1
           coverage: none
 
       - name: Download dependencies
diff --git a/composer.json b/composer.json
index 17fa93e..c4b4560 100644
--- a/composer.json
+++ b/composer.json
@@ -2,7 +2,7 @@
     "type": "project",
     "license": "proprietary",
     "require": {
-        "php": ">=8.0",
+        "php": ">=8.1",
         "ext-ctype": "*",
         "ext-iconv": "*",
         "composer/package-versions-deprecated": "1.11.99.1",
@@ -56,7 +56,10 @@
         "preferred-install": {
             "*": "dist"
         },
-        "sort-packages": true
+        "sort-packages": true,
+        "allow-plugins": {
+            "symfony/flex": true
+        }
     },
     "autoload": {
         "psr-4": {
diff --git a/symfony.lock b/symfony.lock
index c0af849..b3ae037 100644
--- a/symfony.lock
+++ b/symfony.lock
@@ -180,9 +180,6 @@
     "symfony/css-selector": {
         "version": "v4.4.20"
     },
-    "symfony/debug": {
-        "version": "v4.4.20"
-    },
     "symfony/debug-bundle": {
         "version": "4.1",
         "recipe": {
@@ -282,9 +279,6 @@
     "symfony/http-kernel": {
         "version": "v4.4.21"
     },
-    "symfony/inflector": {
-        "version": "v4.4.21"
-    },
     "symfony/intl": {
         "version": "v4.4.20"
     },
@@ -423,15 +417,9 @@
     "symfony/polyfill-php72": {
         "version": "v1.22.1"
     },
-    "symfony/polyfill-php73": {
-        "version": "v1.22.1"
-    },
     "symfony/polyfill-php80": {
         "version": "v1.22.1"
     },
-    "symfony/polyfill-php81": {
-        "version": "v1.23.0"
-    },
     "symfony/polyfill-uuid": {
         "version": "v1.23.0"
     },
@@ -488,9 +476,6 @@
     "symfony/security-csrf": {
         "version": "v4.4.20"
     },
-    "symfony/security-guard": {
-        "version": "v4.4.20"
-    },
     "symfony/security-http": {
         "version": "v4.4.21"
     },