diff --git a/composer.json b/composer.json
index 6ace089..5fdb363 100644
--- a/composer.json
+++ b/composer.json
@@ -4,19 +4,15 @@
     "description": "Hashmap and Collection",
     "license": "MIT",
     "require": {
-        "php": "~8.1.0 || ~8.2.0 || ~8.3.0",
+        "php": "~8.2.0 || ~8.3.0 || ~8.4.0",
         "webmozart/assert": "^1.9"
     },
     "require-dev": {
         "doctrine/coding-standard": "^11.1",
         "phpunit/phpunit": "^10.5",
         "psalm/plugin-phpunit": "^0.19.0",
-        "symfony/polyfill-php80": "^1.22",
         "vimeo/psalm": "^5.9"
     },
-    "conflict": {
-        "vimeo/psalm": "4.6.2"
-    },
     "config": {
         "preferred-install": "dist",
         "sort-packages": true,
diff --git a/composer.lock b/composer.lock
index f180b4e..79c5b3d 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": "417f9430604e5d5d17e73db533111a73",
+    "content-hash": "2111e413a5718a886132742bad1309dc",
     "packages": [
         {
             "name": "webmozart/assert",
@@ -4075,7 +4075,7 @@
     "prefer-stable": false,
     "prefer-lowest": false,
     "platform": {
-        "php": "~8.1.0 || ~8.2.0 || ~8.3.0"
+        "php": "~8.2.0 || ~8.3.0 || ~8.4.0"
     },
     "platform-dev": [],
     "plugin-api-version": "2.6.0"