diff --git a/composer.json b/composer.json
index f03fdc89d..4d679a95c 100644
--- a/composer.json
+++ b/composer.json
@@ -41,7 +41,8 @@
         "mockery/mockery": "^1.4.4",
         "doctrine/coding-standard": "12.0.x-dev",
         "spatie/laravel-query-builder": "^5.6",
-        "phpstan/phpstan": "^1.10"
+        "phpstan/phpstan": "^1.10",
+        "rector/rector": "^1.2"
     },
     "suggest": {
         "league/flysystem-gridfs": "Filesystem storage in MongoDB with GridFS",
@@ -73,7 +74,8 @@
         "test": "phpunit",
         "test:coverage": "phpunit --coverage-clover ./coverage.xml",
         "cs": "phpcs",
-        "cs:fix": "phpcbf"
+        "cs:fix": "phpcbf",
+        "rector": "rector"
     },
     "config": {
         "allow-plugins": {
diff --git a/rector.php b/rector.php
new file mode 100644
index 000000000..23afcb2ea
--- /dev/null
+++ b/rector.php
@@ -0,0 +1,25 @@
+<?php
+
+use Rector\Config\RectorConfig;
+use Rector\Php71\Rector\FuncCall\RemoveExtraParametersRector;
+use Rector\Php74\Rector\Closure\ClosureToArrowFunctionRector;
+use Rector\Php80\Rector\FunctionLike\MixedTypeRector;
+use Rector\Php81\Rector\FuncCall\NullToStrictStringFuncCallArgRector;
+use Rector\TypeDeclaration\Rector\Closure\AddClosureVoidReturnTypeWhereNoReturnRector;
+
+return RectorConfig::configure()
+    ->withPaths([
+        __FILE__,
+        __DIR__ . '/docs',
+        __DIR__ . '/src',
+        __DIR__ . '/tests',
+    ])
+    ->withPhpSets()
+    ->withTypeCoverageLevel(0)
+    ->withSkip([
+        RemoveExtraParametersRector::class,
+        ClosureToArrowFunctionRector::class,
+        NullToStrictStringFuncCallArgRector::class,
+        MixedTypeRector::class,
+        AddClosureVoidReturnTypeWhereNoReturnRector::class,
+    ]);
diff --git a/src/Bus/MongoBatchRepository.php b/src/Bus/MongoBatchRepository.php
index c6314ba69..2656bbc30 100644
--- a/src/Bus/MongoBatchRepository.php
+++ b/src/Bus/MongoBatchRepository.php
@@ -28,7 +28,7 @@
 // are called by PruneBatchesCommand
 class MongoBatchRepository extends DatabaseBatchRepository implements PrunableBatchRepository
 {
-    private Collection $collection;
+    private readonly Collection $collection;
 
     public function __construct(
         BatchFactory $factory,
diff --git a/src/Helpers/QueriesRelationships.php b/src/Helpers/QueriesRelationships.php
index 933b6ec32..1f1ffa34b 100644
--- a/src/Helpers/QueriesRelationships.php
+++ b/src/Helpers/QueriesRelationships.php
@@ -21,12 +21,11 @@
 use function array_map;
 use function class_basename;
 use function collect;
-use function get_class;
 use function in_array;
 use function is_array;
 use function is_string;
 use function method_exists;
-use function strpos;
+use function str_contains;
 
 trait QueriesRelationships
 {
@@ -45,7 +44,7 @@ trait QueriesRelationships
     public function has($relation, $operator = '>=', $count = 1, $boolean = 'and', ?Closure $callback = null)
     {
         if (is_string($relation)) {
-            if (strpos($relation, '.') !== false) {
+            if (str_contains($relation, '.')) {
                 return $this->hasNested($relation, $operator, $count, $boolean, $callback);
             }
 
@@ -139,7 +138,7 @@ private function handleMorphToMany($hasQuery, $relation)
     {
         // First we select the parent models that have a relation to our related model,
         // Then extracts related model's ids from the pivot column
-        $hasQuery->where($relation->getTable() . '.' . $relation->getMorphType(), get_class($relation->getParent()));
+        $hasQuery->where($relation->getTable() . '.' . $relation->getMorphType(), $relation->getParent()::class);
         $relations = $hasQuery->pluck($relation->getTable());
         $relations = $relation->extractIds($relations->flatten(1)->toArray(), $relation->getForeignPivotKeyName());
 
diff --git a/src/Query/Builder.php b/src/Query/Builder.php
index 9b446f8e8..2bbd5a01a 100644
--- a/src/Query/Builder.php
+++ b/src/Query/Builder.php
@@ -1079,7 +1079,7 @@ protected function performUpdate(array $update, array $options = [])
         $wheres = $this->aliasIdForQuery($wheres);
         $result = $this->collection->updateMany($wheres, $update, $options);
         if ($result->isAcknowledged()) {
-            return $result->getModifiedCount() ? $result->getModifiedCount() : $result->getUpsertedCount();
+            return $result->getModifiedCount() ?: $result->getUpsertedCount();
         }
 
         return 0;
diff --git a/tests/PHPStan/SarifErrorFormatter.php b/tests/PHPStan/SarifErrorFormatter.php
index 1fb814cde..92c0255cc 100644
--- a/tests/PHPStan/SarifErrorFormatter.php
+++ b/tests/PHPStan/SarifErrorFormatter.php
@@ -26,9 +26,9 @@ class SarifErrorFormatter implements ErrorFormatter
     private const URI_BASE_ID = 'WORKINGDIR';
 
     public function __construct(
-        private RelativePathHelper $relativePathHelper,
-        private string $currentWorkingDirectory,
-        private bool $pretty,
+        private readonly RelativePathHelper $relativePathHelper,
+        private readonly string $currentWorkingDirectory,
+        private readonly bool $pretty,
     ) {
     }