diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
index 699632d..a458da2 100644
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/tests.yml
@@ -9,15 +9,15 @@ jobs:
     continue-on-error: ${{ matrix.experimental }}
     strategy:
       matrix:
-        php: ['7.4', '8.0', '8.1', '8.2', '8.3']
+        php: ['7.4', '8.0', '8.1', '8.2', '8.3', '8.4']
         experimental: [false]
         include:
-          - php: '8.3'
+          - php: '8.4'
             analysis: true
 
     steps:
       - name: Checkout
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
 
       - name: Set up PHP ${{ matrix.php }}
         uses: shivammathur/setup-php@v2
diff --git a/composer.json b/composer.json
index 53f75a1..cc0333e 100644
--- a/composer.json
+++ b/composer.json
@@ -17,7 +17,7 @@
     "require-dev": {
         "phpunit/phpunit": "^9.5",
         "squizlabs/php_codesniffer": "^3.7",
-        "phpstan/phpstan": "^1.8"
+        "phpstan/phpstan": "^2.1"
     },
     "autoload": {
         "files": [
diff --git a/composer.lock b/composer.lock
index 428f9b3..d6756c1 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": "49b6aa4324b1a770eab448556f44e4ba",
+    "content-hash": "16b4066439046f87b06b149dd7ce4992",
     "packages": [],
     "packages-dev": [
         {
@@ -315,20 +315,15 @@
         },
         {
             "name": "phpstan/phpstan",
-            "version": "1.10.2",
-            "source": {
-                "type": "git",
-                "url": "https://github.com/phpstan/phpstan.git",
-                "reference": "a2ffec7db373d8da4973d1d62add872db5cd22dd"
-            },
+            "version": "2.1.46",
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/phpstan/phpstan/zipball/a2ffec7db373d8da4973d1d62add872db5cd22dd",
-                "reference": "a2ffec7db373d8da4973d1d62add872db5cd22dd",
+                "url": "https://api.github.com/repos/phpstan/phpstan/zipball/a193923fc2d6325ef4e741cf3af8c3e8f54dbf25",
+                "reference": "a193923fc2d6325ef4e741cf3af8c3e8f54dbf25",
                 "shasum": ""
             },
             "require": {
-                "php": "^7.2|^8.0"
+                "php": "^7.4|^8.0"
             },
             "conflict": {
                 "phpstan/phpstan-shim": "*"
@@ -353,8 +348,11 @@
                 "static analysis"
             ],
             "support": {
+                "docs": "https://phpstan.org/user-guide/getting-started",
+                "forum": "https://github.com/phpstan/phpstan/discussions",
                 "issues": "https://github.com/phpstan/phpstan/issues",
-                "source": "https://github.com/phpstan/phpstan/tree/1.10.2"
+                "security": "https://github.com/phpstan/phpstan/security/policy",
+                "source": "https://github.com/phpstan/phpstan-src"
             },
             "funding": [
                 {
@@ -364,13 +362,9 @@
                 {
                     "url": "https://github.com/phpstan",
                     "type": "github"
-                },
-                {
-                    "url": "https://tidelift.com/funding/github/packagist/phpstan/phpstan",
-                    "type": "tidelift"
                 }
             ],
-            "time": "2023-02-23T14:36:46+00:00"
+            "time": "2026-04-01T09:25:14+00:00"
         },
         {
             "name": "phpunit/php-code-coverage",
@@ -1931,5 +1925,5 @@
         "ext-json": "*"
     },
     "platform-dev": {},
-    "plugin-api-version": "2.6.0"
+    "plugin-api-version": "2.9.0"
 }