diff --git a/composer.json b/composer.json
index a585c9d..9ba7fd0 100644
--- a/composer.json
+++ b/composer.json
@@ -15,9 +15,9 @@
     "license": "MIT",
     "require": {
         "php": "^8.1",
-        "nunomaduro/collision": "^7.10.0|^8.0.0",
+        "nunomaduro/collision": "^7.10.0|^8.0.1",
         "pestphp/pest-plugin": "^2.1.1",
-        "ta-tikoma/phpunit-architecture-test": "^0.7.5"
+        "ta-tikoma/phpunit-architecture-test": "^0.8.0"
     },
     "autoload": {
         "psr-4": {
@@ -37,7 +37,7 @@
         ]
     },
     "require-dev": {
-        "pestphp/pest": "^2.27.0",
+        "pestphp/pest": "^2.30.0",
         "pestphp/pest-dev-tools": "^2.16.0"
     },
     "minimum-stability": "dev",
diff --git a/src/Autoload.php b/src/Autoload.php
index ad99ee3..5be50e3 100644
--- a/src/Autoload.php
+++ b/src/Autoload.php
@@ -15,7 +15,7 @@
      * argument is the test description; the second argument
      * is a closure that contains the test expectations.
      */
-    function arch(string $description, Closure $closure = null): TestCall
+    function arch(string $description, ?Closure $closure = null): TestCall
     {
         $test = test($description, $closure);