diff --git a/.php-cs-fixer.dist.php b/.php-cs-fixer.dist.php
index 9250928..50f0a34 100644
--- a/.php-cs-fixer.dist.php
+++ b/.php-cs-fixer.dist.php
@@ -2,6 +2,7 @@
 
 use PhpCsFixer\Config;
 use PhpCsFixer\Finder;
+use PhpCsFixer\Runner\Parallel\ParallelConfigFactory;
 
 $finder = Finder::create()
     ->in(__DIR__)
@@ -24,4 +25,5 @@
             'import_functions' => true,
         ]
     ])
+    ->setParallelConfig(ParallelConfigFactory::detect())
     ->setFinder($finder);
diff --git a/phpstan.neon b/phpstan.neon
index 9263e67..24adda2 100644
--- a/phpstan.neon
+++ b/phpstan.neon
@@ -5,7 +5,7 @@ parameters:
 
     type_coverage:
         return: 100
-        param: 90
+        param: 100
         property: 100
         declare: 100
         constant: 0
diff --git a/src/Models/Error.php b/src/Models/Error.php
index fa36cf7..0d6ccca 100644
--- a/src/Models/Error.php
+++ b/src/Models/Error.php
@@ -90,7 +90,7 @@ public function stackTraceToArray(Throwable $throwable): array
         // Exception object `getTrace` does not return file and line number for the first line
         // http://php.net/manual/en/exception.gettrace.php#107563
 
-        $inApp = function ($file): bool {
+        $inApp = function (string $file): bool {
             return !str_contains($file, 'vendor') &&
                 !str_contains($file, 'index.php') &&
                 !str_contains($file, 'web/core'); // Drupal
diff --git a/src/Models/Model.php b/src/Models/Model.php
index 531d17a..87a3c4a 100644
--- a/src/Models/Model.php
+++ b/src/Models/Model.php
@@ -34,7 +34,7 @@ public function only(array $keys): array
 
     public function jsonSerialize(): array
     {
-        return array_filter($this->getProperties(), fn ($value): bool|int =>
+        return array_filter($this->getProperties(), fn (mixed $value): bool|int =>
             // remove NULL, FALSE, empty strings and empty arrays, but keep values of 0 (zero)
             is_array($value) || is_object($value) ? !empty($value) : strlen((string) ($value ?? '')));
     }
diff --git a/src/Models/Transaction.php b/src/Models/Transaction.php
index 0697be5..2837a8e 100644
--- a/src/Models/Transaction.php
+++ b/src/Models/Transaction.php
@@ -63,7 +63,7 @@ public function setType(string $type): Transaction
      *
      * @param integer|string $id
      */
-    public function withUser($id, ?string $name = null, ?string $email = null): Transaction
+    public function withUser(int|string $id, ?string $name = null, ?string $email = null): Transaction
     {
         $this->user = new User($id, $name, $email);
         return $this;
diff --git a/tests/AgentTest.php b/tests/AgentTest.php
index ce23a86..f401d1b 100644
--- a/tests/AgentTest.php
+++ b/tests/AgentTest.php
@@ -60,14 +60,15 @@ public function testCallbackReturn(): void
 
     public function testAddSegmentWithInput(): void
     {
-        $this->inspector->addSegment(function ($segment): void {
+        $this->inspector->addSegment(function (Segment $segment): void {
             $this->assertInstanceOf(Segment::class, $segment);
         }, 'callback', 'test callback', true);
     }
 
     public function testAddSegmentWithInputContext(): void
     {
-        $segment = $this->inspector->addSegment(fn ($segment) => $segment->setContext(['foo' => 'bar']), 'callback', 'test callback', true);
+        $segment = $this->inspector
+            ->addSegment(fn (Segment $segment) => $segment->setContext(['foo' => 'bar']), 'callback', 'test callback', true);
 
         $this->assertEquals(['foo' => 'bar'], $segment->getContext());
     }
diff --git a/tests/NestedSegmentsTest.php b/tests/NestedSegmentsTest.php
index 4e67839..235212b 100644
--- a/tests/NestedSegmentsTest.php
+++ b/tests/NestedSegmentsTest.php
@@ -185,7 +185,7 @@ public function testMixedStartAndAddSegment(): void
 
         $this->inspector->startSegment('parent', 'parent-operation');
 
-        $result = $this->inspector->addSegment(function ($segment): string {
+        $result = $this->inspector->addSegment(function (Segment $segment): string {
             $this->assertEquals($this->inspector->getOpenSegments()[0]['hash'], $segment->parent_hash);
 
             // Start another segment inside the callback
@@ -273,7 +273,7 @@ public function testAddSegmentWithExceptionHandling(): void
         $this->inspector->startSegment('parent', 'parent-operation');
 
         // Test with throw = false
-        $result = $this->inspector->addSegment(function ($segment): void {
+        $result = $this->inspector->addSegment(function (): void {
             throw new Exception('Test exception');
         }, 'child', 'child-operation', false);