diff --git a/.github/workflows/rector.yaml b/.github/workflows/rector.yaml
index 8c447308..b87d60ca 100644
--- a/.github/workflows/rector.yaml
+++ b/.github/workflows/rector.yaml
@@ -23,7 +23,7 @@ jobs:
             -
                 uses: shivammathur/setup-php@v2
                 with:
-                    php-version: 8.3
+                    php-version: 8.4
                     coverage: none
 
             -   uses: "ramsey/composer-install@v2"
diff --git a/composer.json b/composer.json
index 6b5a62db..32bdc647 100644
--- a/composer.json
+++ b/composer.json
@@ -4,10 +4,10 @@
     "license": "MIT",
     "description": "Rector downgrade PHP rules",
     "require": {
-        "php": ">=8.3"
+        "php": ">=8.4"
     },
     "require-dev": {
-        "boundwize/structarmed": "^0.9",
+        "boundwize/structarmed": "^0.14",
         "phpstan/extension-installer": "^1.4",
         "phpstan/phpstan": "^2.1.33",
         "phpstan/phpstan-webmozart-assert": "^2.0",
diff --git a/rules/DowngradePhp72/Rector/ClassMethod/DowngradeParameterTypeWideningRector.php b/rules/DowngradePhp72/Rector/ClassMethod/DowngradeParameterTypeWideningRector.php
index b153bc67..37a8987a 100644
--- a/rules/DowngradePhp72/Rector/ClassMethod/DowngradeParameterTypeWideningRector.php
+++ b/rules/DowngradePhp72/Rector/ClassMethod/DowngradeParameterTypeWideningRector.php
@@ -211,13 +211,7 @@ private function removeParamTypeFromMethod(ClassMethod $classMethod, int $paramP
 
     private function hasParamAlreadyNonTyped(ClassMethod $classMethod): bool
     {
-        foreach ($classMethod->params as $param) {
-            if ($param->type !== null) {
-                return false;
-            }
-        }
-
-        return true;
+        return array_all($classMethod->params, fn(Param $param): bool => !$param->type instanceof Node);
     }
 
     private function isSafeType(ClassReflection $classReflection, ClassMethod $classMethod): bool
diff --git a/rules/DowngradePhp74/Rector/ClassMethod/DowngradeCovariantReturnTypeRector.php b/rules/DowngradePhp74/Rector/ClassMethod/DowngradeCovariantReturnTypeRector.php
index c1184515..c3505300 100644
--- a/rules/DowngradePhp74/Rector/ClassMethod/DowngradeCovariantReturnTypeRector.php
+++ b/rules/DowngradePhp74/Rector/ClassMethod/DowngradeCovariantReturnTypeRector.php
@@ -261,12 +261,6 @@ private function isNullable(Type $parentReturnType, Type $returnType): bool
             return false;
         }
 
-        foreach ($parentReturnType->getTypes() as $type) {
-            if ($type->equals($returnType)) {
-                return true;
-            }
-        }
-
-        return false;
+        return array_any($parentReturnType->getTypes(), fn(Type $type): bool => $type->equals($returnType));
     }
 }
diff --git a/rules/DowngradePhp82/Rector/Class_/DowngradeUnionIntersectionRector.php b/rules/DowngradePhp82/Rector/Class_/DowngradeUnionIntersectionRector.php
index 9f7ee694..1acdb235 100644
--- a/rules/DowngradePhp82/Rector/Class_/DowngradeUnionIntersectionRector.php
+++ b/rules/DowngradePhp82/Rector/Class_/DowngradeUnionIntersectionRector.php
@@ -4,6 +4,8 @@
 
 namespace Rector\DowngradePhp82\Rector\Class_;
 
+use PhpParser\Node\Identifier;
+use PhpParser\Node\Name;
 use PhpParser\Node;
 use PhpParser\Node\Expr\ArrowFunction;
 use PhpParser\Node\Expr\Closure;
@@ -135,12 +137,6 @@ private function isUnionIntersection(?Node $node): bool
             return false;
         }
 
-        foreach ($node->types as $type) {
-            if ($type instanceof IntersectionType) {
-                return true;
-            }
-        }
-
-        return false;
+        return array_any($node->types, fn(Identifier|Name|IntersectionType $type): bool => $type instanceof IntersectionType);
     }
 }