diff --git a/composer.lock b/composer.lock
index dba8718..37f757f 100644
--- a/composer.lock
+++ b/composer.lock
@@ -845,16 +845,16 @@
         },
         {
             "name": "guzzlehttp/promises",
-            "version": "2.0.3",
+            "version": "2.0.4",
             "source": {
                 "type": "git",
                 "url": "https://github.com/guzzle/promises.git",
-                "reference": "6ea8dd08867a2a42619d65c3deb2c0fcbf81c8f8"
+                "reference": "f9c436286ab2892c7db7be8c8da4ef61ccf7b455"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/guzzle/promises/zipball/6ea8dd08867a2a42619d65c3deb2c0fcbf81c8f8",
-                "reference": "6ea8dd08867a2a42619d65c3deb2c0fcbf81c8f8",
+                "url": "https://api.github.com/repos/guzzle/promises/zipball/f9c436286ab2892c7db7be8c8da4ef61ccf7b455",
+                "reference": "f9c436286ab2892c7db7be8c8da4ef61ccf7b455",
                 "shasum": ""
             },
             "require": {
@@ -908,7 +908,7 @@
             ],
             "support": {
                 "issues": "https://github.com/guzzle/promises/issues",
-                "source": "https://github.com/guzzle/promises/tree/2.0.3"
+                "source": "https://github.com/guzzle/promises/tree/2.0.4"
             },
             "funding": [
                 {
@@ -924,7 +924,7 @@
                     "type": "tidelift"
                 }
             ],
-            "time": "2024-07-18T10:29:17+00:00"
+            "time": "2024-10-17T10:06:22+00:00"
         },
         {
             "name": "guzzlehttp/psr7",
@@ -3352,16 +3352,16 @@
         },
         {
             "name": "sebastian/comparator",
-            "version": "5.0.2",
+            "version": "5.0.3",
             "source": {
                 "type": "git",
                 "url": "https://github.com/sebastianbergmann/comparator.git",
-                "reference": "2d3e04c3b4c1e84a5e7382221ad8883c8fbc4f53"
+                "reference": "a18251eb0b7a2dcd2f7aa3d6078b18545ef0558e"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/sebastianbergmann/comparator/zipball/2d3e04c3b4c1e84a5e7382221ad8883c8fbc4f53",
-                "reference": "2d3e04c3b4c1e84a5e7382221ad8883c8fbc4f53",
+                "url": "https://api.github.com/repos/sebastianbergmann/comparator/zipball/a18251eb0b7a2dcd2f7aa3d6078b18545ef0558e",
+                "reference": "a18251eb0b7a2dcd2f7aa3d6078b18545ef0558e",
                 "shasum": ""
             },
             "require": {
@@ -3372,7 +3372,7 @@
                 "sebastian/exporter": "^5.0"
             },
             "require-dev": {
-                "phpunit/phpunit": "^10.4"
+                "phpunit/phpunit": "^10.5"
             },
             "type": "library",
             "extra": {
@@ -3417,7 +3417,7 @@
             "support": {
                 "issues": "https://github.com/sebastianbergmann/comparator/issues",
                 "security": "https://github.com/sebastianbergmann/comparator/security/policy",
-                "source": "https://github.com/sebastianbergmann/comparator/tree/5.0.2"
+                "source": "https://github.com/sebastianbergmann/comparator/tree/5.0.3"
             },
             "funding": [
                 {
@@ -3425,7 +3425,7 @@
                     "type": "github"
                 }
             ],
-            "time": "2024-08-12T06:03:08+00:00"
+            "time": "2024-10-18T14:56:07+00:00"
         },
         {
             "name": "sebastian/complexity",
diff --git a/src/Processor/Attribute/BaseProcessorAttribute.php b/src/Processor/Attribute/BaseProcessorAttribute.php
index d98e682..542b8b3 100644
--- a/src/Processor/Attribute/BaseProcessorAttribute.php
+++ b/src/Processor/Attribute/BaseProcessorAttribute.php
@@ -6,12 +6,12 @@
 
 abstract class BaseProcessorAttribute implements ProcessableAttribute, CustomizableMessageAttribute
 {
-    protected array $processors;
-    protected array $messages;
+    private readonly array $processors;
+    private readonly array $messages;
 
     public function __construct(array $processors, ?array $messages = null)
     {
-        $this->processors = $this->normalizeProcessors($processors);
+        $this->processors = self::filterValidProcessors($processors);
         $this->messages = $messages ?? [];
     }
 
@@ -25,19 +25,8 @@ public function getMessage(string $processorName): ?string
         return $this->messages[$processorName] ?? null;
     }
 
-    protected function normalizeProcessors(array $processors): array
+    private static function filterValidProcessors(array $processors): array
     {
-        $normalized = [];
-        foreach ($processors as $key => $value) {
-            if (is_int($key)) {
-                $normalized[$value] = [];
-            } elseif (is_string($value)) {
-                $normalized[$key] = [];
-            } else {
-                $normalized[$key] = $value;
-            }
-        }
-
-        return $normalized;
+        return array_filter($processors, static fn ($v) => null !== $v && false !== $v);
     }
 }