diff --git a/tools/phpstan/composer.json b/tools/phpstan/composer.json
index 6af58cea..b41da84b 100644
--- a/tools/phpstan/composer.json
+++ b/tools/phpstan/composer.json
@@ -3,7 +3,7 @@
   "description": "Aeon PHP Calendar - Tools",
   "require-dev": {
     "php": "~8.2.0 || ~8.3.0 || ~8.4.0 || ~8.5.0",
-    "phpstan/phpstan": "^1.1.2"
+    "phpstan/phpstan": "^2.2.2"
   },
   "config": {
     "allow-plugins": false
diff --git a/tools/phpstan/composer.lock b/tools/phpstan/composer.lock
index d03eb671..ed3c8ca2 100644
--- a/tools/phpstan/composer.lock
+++ b/tools/phpstan/composer.lock
@@ -4,20 +4,20 @@
         "Read more about it at https://getcomposer.org/doc/01-basic-usage.md#installing-dependencies",
         "This file is @generated automatically"
     ],
-    "content-hash": "ef919c74d453f1b6150932ead7e41719",
+    "content-hash": "bd668a60e98f453880334c81af5959c3",
     "packages": [],
     "packages-dev": [
         {
             "name": "phpstan/phpstan",
-            "version": "1.12.32",
+            "version": "2.2.2",
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/phpstan/phpstan/zipball/2770dcdf5078d0b0d53f94317e06affe88419aa8",
-                "reference": "2770dcdf5078d0b0d53f94317e06affe88419aa8",
+                "url": "https://api.github.com/repos/phpstan/phpstan/zipball/e5cc34d491a90e79c216d824f60fe21fd4d93bd6",
+                "reference": "e5cc34d491a90e79c216d824f60fe21fd4d93bd6",
                 "shasum": ""
             },
             "require": {
-                "php": "^7.2|^8.0"
+                "php": "^7.4|^8.0"
             },
             "conflict": {
                 "phpstan/phpstan-shim": "*"
@@ -36,6 +36,17 @@
             "license": [
                 "MIT"
             ],
+            "authors": [
+                {
+                    "name": "Ondřej Mirtes"
+                },
+                {
+                    "name": "Markus Staab"
+                },
+                {
+                    "name": "Vincent Langlet"
+                }
+            ],
             "description": "PHPStan - PHP Static Analysis Tool",
             "keywords": [
                 "dev",
@@ -58,7 +69,7 @@
                     "type": "github"
                 }
             ],
-            "time": "2025-09-30T10:16:31+00:00"
+            "time": "2026-06-05T09:00:01+00:00"
         }
     ],
     "aliases": [],
@@ -68,7 +79,7 @@
     "prefer-lowest": false,
     "platform": {},
     "platform-dev": {
-        "php": "~8.2.0 || ~8.3.0 || ~8.4.0"
+        "php": "~8.2.0 || ~8.3.0 || ~8.4.0 || ~8.5.0"
     },
-    "plugin-api-version": "2.6.0"
+    "plugin-api-version": "2.9.0"
 }