diff --git a/src/TwigHooks/src/Hookable/Renderer/Exception/NoSupportedRendererException.php b/src/TwigHooks/src/Hookable/Renderer/Exception/NoSupportedRendererException.php
index 46ca1bf1..7709237d 100644
--- a/src/TwigHooks/src/Hookable/Renderer/Exception/NoSupportedRendererException.php
+++ b/src/TwigHooks/src/Hookable/Renderer/Exception/NoSupportedRendererException.php
@@ -20,7 +20,7 @@ public function __construct(
         string $hookableName,
         string $message = 'No supported renderer found for the hook "%s" and "%s" hookable.',
         int $code = 0,
-        \Throwable $previous = null,
+        ?\Throwable $previous = null,
     ) {
         parent::__construct(
             sprintf(
diff --git a/src/TwigHooks/src/Profiler/HooksDataCollector.php b/src/TwigHooks/src/Profiler/HooksDataCollector.php
index ca650b21..a9121950 100644
--- a/src/TwigHooks/src/Profiler/HooksDataCollector.php
+++ b/src/TwigHooks/src/Profiler/HooksDataCollector.php
@@ -28,7 +28,7 @@ public function __construct(
     ) {
     }
 
-    public function collect(Request $request, Response $response, \Throwable $exception = null): void
+    public function collect(Request $request, Response $response, ?\Throwable $exception = null): void
     {
     }
 
diff --git a/src/TwigHooks/src/Twig/Node/HookNode.php b/src/TwigHooks/src/Twig/Node/HookNode.php
index 9e0a55df..9f8b50ff 100644
--- a/src/TwigHooks/src/Twig/Node/HookNode.php
+++ b/src/TwigHooks/src/Twig/Node/HookNode.php
@@ -25,7 +25,7 @@ public function __construct(
         ?Node $context,
         bool $only,
         int $lineno,
-        string $tag = null,
+        ?string $tag = null,
     ) {
         parent::__construct(
             [