diff --git a/composer.json b/composer.json
index 7edeeaf..6da911b 100644
--- a/composer.json
+++ b/composer.json
@@ -4,7 +4,7 @@
     "type": "project",
     "require": {
         "php": "^8.2",
-        "webonyx/graphql-php": "^14.11",
+        "webonyx/graphql-php": "^15.0.1",
         "symfony/console": "^6.1",
         "illuminate/support": "^9.0",
         "symfony/dependency-injection": "^6.0",
diff --git a/src/Fixes/NonNullFixer.php b/src/Fixes/NonNullFixer.php
index 110fcd9..f4ba371 100644
--- a/src/Fixes/NonNullFixer.php
+++ b/src/Fixes/NonNullFixer.php
@@ -26,7 +26,6 @@ public function fix(ProblemDescriptor $problemDescriptor): void
 
         $this->nodeReplacerCollector->addNodeToReplace(
             $node,
-            /** @phpstan-ignore-next-line */
             new NonNullTypeNode([
                 'type' => $node,
             ])
diff --git a/src/Visitors/VisitorCollector.php b/src/Visitors/VisitorCollector.php
index 42a9bd8..15e929c 100644
--- a/src/Visitors/VisitorCollector.php
+++ b/src/Visitors/VisitorCollector.php
@@ -24,6 +24,9 @@
 use Worksome\Graphlint\Inspections\Inspection;
 use Worksome\Graphlint\ProblemsHolder;
 
+/**
+ * @phpstan-import-type VisitorArray from Visitor
+ */
 abstract class VisitorCollector
 {
     /**
@@ -37,10 +40,13 @@ abstract public function getInspections(): iterable;
     abstract public function getSuppressors(): iterable;
 
     /**
-     * @return array<string, callable>
+     * @return array<string, mixed>
+     *
+     * @phpstan-return VisitorArray
      */
     public function getVisitor(ProblemsHolder $problemsHolder, AffectedInspections $affectedInspections): array
     {
+        /** @var array<int, VisitorArray> $visitors */
         $visitors = array_map(
             fn(Inspection $inspection) => [
                 NodeKind::FIELD_DEFINITION => $this->wrapper(