diff --git a/docs/includes/fundamentals/as-avs/AtlasSearchTest.php b/docs/includes/fundamentals/as-avs/AtlasSearchTest.php
index 79dfe46df..bec0d6638 100644
--- a/docs/includes/fundamentals/as-avs/AtlasSearchTest.php
+++ b/docs/includes/fundamentals/as-avs/AtlasSearchTest.php
@@ -149,9 +149,9 @@ public function testVectorSearch(): void
     /** Generates random vectors using fixed seed to make tests deterministic */
     private function addVector(array $items): array
     {
-        srand(1);
+        mt_srand(1);
         foreach ($items as &$item) {
-            $this->vectors[] = $item['vector4'] = array_map(fn () => rand() / mt_getrandmax(), range(0, 3));
+            $this->vectors[] = $item['vector4'] = array_map(fn () => random_int(0, mt_getrandmax()) / mt_getrandmax(), range(0, 3));
         }
 
         return $items;
diff --git a/rector.php b/rector.php
index 23afcb2ea..3776c15d7 100644
--- a/rector.php
+++ b/rector.php
@@ -6,6 +6,7 @@
 use Rector\Php80\Rector\FunctionLike\MixedTypeRector;
 use Rector\Php81\Rector\FuncCall\NullToStrictStringFuncCallArgRector;
 use Rector\TypeDeclaration\Rector\Closure\AddClosureVoidReturnTypeWhereNoReturnRector;
+use Rector\Php84\Rector\Param\ExplicitNullableParamTypeRector;
 
 return RectorConfig::configure()
     ->withPaths([
@@ -16,6 +17,9 @@
     ])
     ->withPhpSets()
     ->withTypeCoverageLevel(0)
+    ->withRules([
+        ExplicitNullableParamTypeRector::class,
+    ])
     ->withSkip([
         RemoveExtraParametersRector::class,
         ClosureToArrowFunctionRector::class,
diff --git a/src/CommandSubscriber.php b/src/CommandSubscriber.php
index 1cad23280..1a3f41b0b 100644
--- a/src/CommandSubscriber.php
+++ b/src/CommandSubscriber.php
@@ -18,7 +18,7 @@ final class CommandSubscriber implements CommandSubscriberInterface
     /** @var array<string, CommandStartedEvent> */
     private array $commands = [];
 
-    public function __construct(private Connection $connection)
+    public function __construct(private readonly Connection $connection)
     {
     }
 
diff --git a/src/Scout/ScoutEngine.php b/src/Scout/ScoutEngine.php
index 9455608bb..e026aa03d 100644
--- a/src/Scout/ScoutEngine.php
+++ b/src/Scout/ScoutEngine.php
@@ -69,8 +69,8 @@ final class ScoutEngine extends Engine
 
     /** @param array<string, array> $indexDefinitions */
     public function __construct(
-        private Database $database,
-        private bool $softDelete,
+        private readonly Database $database,
+        private readonly bool $softDelete,
         private array $indexDefinitions = [],
     ) {
     }
diff --git a/tests/AtlasSearchTest.php b/tests/AtlasSearchTest.php
index 43848c09a..4f953644b 100644
--- a/tests/AtlasSearchTest.php
+++ b/tests/AtlasSearchTest.php
@@ -256,9 +256,9 @@ public function testEloquentBuilderVectorSearch()
     /** Generate random vectors using fixed seed to make tests deterministic */
     private function addVector(array $items): array
     {
-        srand(1);
+        mt_srand(1);
         foreach ($items as &$item) {
-            $this->vectors[] = $item['vector4'] = array_map(fn () => rand() / mt_getrandmax(), range(0, 3));
+            $this->vectors[] = $item['vector4'] = array_map(fn () => random_int(0, mt_getrandmax()) / mt_getrandmax(), range(0, 3));
         }
 
         return $items;