diff --git a/composer.json b/composer.json
index 95b3a4e..14c6a32 100644
--- a/composer.json
+++ b/composer.json
@@ -10,7 +10,7 @@
     },
     "require-dev": {
         "friendsofphp/php-cs-fixer": "v3.11.0",
-        "phpstan/phpstan": "1.8.6",
+        "phpstan/phpstan": "1.9.8",
         "phpstan/phpstan-phpunit": "^1.1.0",
         "phpstan/phpstan-strict-rules": "^1.2.0",
         "phpunit/phpunit": "^9.2"
diff --git a/composer.lock b/composer.lock
index 1c2cf05..049f408 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": "8a6b776266df1885dd1333110ad28a25",
+    "content-hash": "f6a461c503126eae544b8c44f031181d",
     "packages": [
         {
             "name": "adhocore/json-comment",
@@ -2061,16 +2061,16 @@
         },
         {
             "name": "phpstan/phpstan",
-            "version": "1.8.6",
+            "version": "1.9.8",
             "source": {
                 "type": "git",
                 "url": "https://github.com/phpstan/phpstan.git",
-                "reference": "c386ab2741e64cc9e21729f891b28b2b10fe6618"
+                "reference": "45411d15bf85a33b4a8ee9b75a6e82998c9adb97"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/phpstan/phpstan/zipball/c386ab2741e64cc9e21729f891b28b2b10fe6618",
-                "reference": "c386ab2741e64cc9e21729f891b28b2b10fe6618",
+                "url": "https://api.github.com/repos/phpstan/phpstan/zipball/45411d15bf85a33b4a8ee9b75a6e82998c9adb97",
+                "reference": "45411d15bf85a33b4a8ee9b75a6e82998c9adb97",
                 "shasum": ""
             },
             "require": {
@@ -2100,7 +2100,7 @@
             ],
             "support": {
                 "issues": "https://github.com/phpstan/phpstan/issues",
-                "source": "https://github.com/phpstan/phpstan/tree/1.8.6"
+                "source": "https://github.com/phpstan/phpstan/tree/1.9.8"
             },
             "funding": [
                 {
@@ -2116,7 +2116,7 @@
                     "type": "tidelift"
                 }
             ],
-            "time": "2022-09-23T09:54:39+00:00"
+            "time": "2023-01-08T21:26:18+00:00"
         },
         {
             "name": "phpstan/phpstan-phpunit",