diff --git a/composer.json b/composer.json
index 5afb59e7..0ffad5ed 100644
--- a/composer.json
+++ b/composer.json
@@ -24,7 +24,7 @@
     "php-parallel-lint/php-console-highlighter": "^1.0",
     "php-parallel-lint/php-parallel-lint": "^1.4.0",
     "php-standard-library/psalm-plugin": "^1.1.5 || ^2.2.1",
-    "phpstan/phpstan": "^1.11.9",
+    "phpstan/phpstan": "^1.12.1",
     "phpunit/phpunit": "^10.5.31",
     "psalm/plugin-mockery": "^1.1",
     "psalm/plugin-phpunit": "^0.19.0",
diff --git a/composer.lock b/composer.lock
index f83fb99b..33c41c4e 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": "af96ee62cc1447ae53b04ef2b5a9e141",
+    "content-hash": "f96e9adc0d9c4a33d56b1055664ac3ca",
     "packages": [
         {
             "name": "amphp/amp",
@@ -5238,16 +5238,16 @@
         },
         {
             "name": "phpstan/phpstan",
-            "version": "1.11.9",
+            "version": "1.12.1",
             "source": {
                 "type": "git",
                 "url": "https://github.com/phpstan/phpstan.git",
-                "reference": "e370bcddadaede0c1716338b262346f40d296f82"
+                "reference": "d8ed7fffa66de1db0d2972267d8ed1d8fa0fe5a2"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/phpstan/phpstan/zipball/e370bcddadaede0c1716338b262346f40d296f82",
-                "reference": "e370bcddadaede0c1716338b262346f40d296f82",
+                "url": "https://api.github.com/repos/phpstan/phpstan/zipball/d8ed7fffa66de1db0d2972267d8ed1d8fa0fe5a2",
+                "reference": "d8ed7fffa66de1db0d2972267d8ed1d8fa0fe5a2",
                 "shasum": ""
             },
             "require": {
@@ -5292,7 +5292,7 @@
                     "type": "github"
                 }
             ],
-            "time": "2024-08-01T16:25:18+00:00"
+            "time": "2024-09-03T19:55:22+00:00"
         },
         {
             "name": "phpstan/phpstan-deprecation-rules",