diff --git a/composer.json b/composer.json
index bdc0731..dea454d 100644
--- a/composer.json
+++ b/composer.json
@@ -64,6 +64,6 @@
     "phpunit/phpunit": "~9|~10",
     "squizlabs/php_codesniffer": "3.13.2",
     "overtrue/phplint": "9.6.2",
-    "phpstan/phpstan": "1.12.28"
+    "phpstan/phpstan": "2.1.31"
   }
 }
diff --git a/composer.lock b/composer.lock
index 7edb5de..7a099d8 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": "61043a0169c93bd3c109726a070c8a73",
+    "content-hash": "70190397a65b1b68112a743dcbc4e0df",
     "packages": [
         {
             "name": "psr/log",
@@ -389,20 +389,15 @@
         },
         {
             "name": "phpstan/phpstan",
-            "version": "1.12.28",
-            "source": {
-                "type": "git",
-                "url": "https://github.com/phpstan/phpstan.git",
-                "reference": "fcf8b71aeab4e1a1131d1783cef97b23a51b87a9"
-            },
+            "version": "2.1.31",
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/phpstan/phpstan/zipball/fcf8b71aeab4e1a1131d1783cef97b23a51b87a9",
-                "reference": "fcf8b71aeab4e1a1131d1783cef97b23a51b87a9",
+                "url": "https://api.github.com/repos/phpstan/phpstan/zipball/ead89849d879fe203ce9292c6ef5e7e76f867b96",
+                "reference": "ead89849d879fe203ce9292c6ef5e7e76f867b96",
                 "shasum": ""
             },
             "require": {
-                "php": "^7.2|^8.0"
+                "php": "^7.4|^8.0"
             },
             "conflict": {
                 "phpstan/phpstan-shim": "*"
@@ -443,7 +438,7 @@
                     "type": "github"
                 }
             ],
-            "time": "2025-07-17T17:15:39+00:00"
+            "time": "2025-10-10T14:14:11+00:00"
         },
         {
             "name": "phpunit/php-code-coverage",