diff --git a/composer.json b/composer.json
index 6c086ee2..0f9696cd 100644
--- a/composer.json
+++ b/composer.json
@@ -24,7 +24,7 @@
         "infection/infection": "^0.26",
         "lcobucci/coding-standard": "^9.0",
         "phpstan/extension-installer": "^1.2",
-        "phpstan/phpstan": "^1.8",
+        "phpstan/phpstan": "^1.9",
         "phpstan/phpstan-deprecation-rules": "^1.0",
         "phpstan/phpstan-phpunit": "^1.1",
         "phpstan/phpstan-strict-rules": "^1.4",
diff --git a/composer.lock b/composer.lock
index f164d695..9c5ba850 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": "b5287d1c9b5f3b649ded87dac22824e3",
+    "content-hash": "597d54937a945596e978a44a4cba1a27",
     "packages": [
         {
             "name": "brick/math",
@@ -3156,16 +3156,16 @@
         },
         {
             "name": "phpstan/phpstan",
-            "version": "1.8.11",
+            "version": "1.9.18",
             "source": {
                 "type": "git",
                 "url": "https://github.com/phpstan/phpstan.git",
-                "reference": "46e223dd68a620da18855c23046ddb00940b4014"
+                "reference": "f2d5cf71be91172a57c649770b73c20ebcffb0bf"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/phpstan/phpstan/zipball/46e223dd68a620da18855c23046ddb00940b4014",
-                "reference": "46e223dd68a620da18855c23046ddb00940b4014",
+                "url": "https://api.github.com/repos/phpstan/phpstan/zipball/f2d5cf71be91172a57c649770b73c20ebcffb0bf",
+                "reference": "f2d5cf71be91172a57c649770b73c20ebcffb0bf",
                 "shasum": ""
             },
             "require": {
@@ -3195,7 +3195,7 @@
             ],
             "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/1.9.18"
             },
             "funding": [
                 {
@@ -3211,7 +3211,7 @@
                     "type": "tidelift"
                 }
             ],
-            "time": "2022-10-24T15:45:13+00:00"
+            "time": "2023-02-17T15:01:27+00:00"
         },
         {
             "name": "phpstan/phpstan-deprecation-rules",