diff --git a/composer.json b/composer.json
index 126e3ba6..fdfb166f 100644
--- a/composer.json
+++ b/composer.json
@@ -23,7 +23,7 @@
 		"php-parallel-lint/php-parallel-lint": "^1.3.2",
 		"phpcompatibility/phpcompatibility-wp": "^2.1.4",
 		"phpmd/phpmd": "^2.13.0",
-		"phpstan/phpstan": "^1.8.11",
+		"phpstan/phpstan": "^1.9.0",
 		"roave/security-advisories": "dev-master",
 		"squizlabs/php_codesniffer": "^3.7.1",
 		"szepeviktor/phpstan-wordpress": "^1.1.3",
diff --git a/composer.lock b/composer.lock
index 43d57471..4a547eb6 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": "6c891a469d9f87bbf5423f93e58bb9ee",
+    "content-hash": "e247a1fd61ea77d378d14b358f91e983",
     "packages": [],
     "packages-dev": [
         {
@@ -564,16 +564,16 @@
         },
         {
             "name": "phpstan/phpstan",
-            "version": "1.8.11",
+            "version": "1.9.0",
             "source": {
                 "type": "git",
                 "url": "https://github.com/phpstan/phpstan.git",
-                "reference": "46e223dd68a620da18855c23046ddb00940b4014"
+                "reference": "e08de53a5eec983de78a787a88e72518cf8fe43a"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/phpstan/phpstan/zipball/46e223dd68a620da18855c23046ddb00940b4014",
-                "reference": "46e223dd68a620da18855c23046ddb00940b4014",
+                "url": "https://api.github.com/repos/phpstan/phpstan/zipball/e08de53a5eec983de78a787a88e72518cf8fe43a",
+                "reference": "e08de53a5eec983de78a787a88e72518cf8fe43a",
                 "shasum": ""
             },
             "require": {
@@ -603,7 +603,7 @@
             ],
             "support": {
                 "issues": "https://github.com/phpstan/phpstan/issues",
-                "source": "https://github.com/phpstan/phpstan/tree/1.8.11"
+                "source": "https://github.com/phpstan/phpstan/tree/1.9.0"
             },
             "funding": [
                 {
@@ -619,7 +619,7 @@
                     "type": "tidelift"
                 }
             ],
-            "time": "2022-10-24T15:45:13+00:00"
+            "time": "2022-11-03T07:26:48+00:00"
         },
         {
             "name": "psr/container",