diff --git a/rules/CodeQuality/Rector/ClassMethod/ExplicitReturnNullRector.php b/rules/CodeQuality/Rector/ClassMethod/ExplicitReturnNullRector.php
index b1eb0d4b377..6cf5d3d168c 100644
--- a/rules/CodeQuality/Rector/ClassMethod/ExplicitReturnNullRector.php
+++ b/rules/CodeQuality/Rector/ClassMethod/ExplicitReturnNullRector.php
@@ -102,10 +102,10 @@ CODE_SAMPLE
      */
     public function getNodeTypes() : array
     {
-        return [ClassMethod::class];
+        return [ClassMethod::class, Function_::class];
     }
     /**
-     * @param ClassMethod $node
+     * @param ClassMethod|Function_ $node
      */
     public function refactor(Node $node) : ?Node
     {
@@ -113,7 +113,7 @@ CODE_SAMPLE
         if ($node->returnType instanceof Node) {
             return null;
         }
-        if ($this->isName($node, MethodName::CONSTRUCT)) {
+        if ($node instanceof ClassMethod && $this->isName($node, MethodName::CONSTRUCT)) {
             return null;
         }
         $returnType = $this->returnTypeInferer->inferFunctionLike($node);
@@ -143,9 +143,12 @@ CODE_SAMPLE
         $this->transformDocUnionVoidToUnionNull($node);
         return $node;
     }
-    private function transformDocUnionVoidToUnionNull(ClassMethod $classMethod) : void
+    /**
+     * @param \PhpParser\Node\Stmt\ClassMethod|\PhpParser\Node\Stmt\Function_ $node
+     */
+    private function transformDocUnionVoidToUnionNull($node) : void
     {
-        $phpDocInfo = $this->phpDocInfoFactory->createFromNodeOrEmpty($classMethod);
+        $phpDocInfo = $this->phpDocInfoFactory->createFromNodeOrEmpty($node);
         $returnType = $phpDocInfo->getReturnType();
         if (!$returnType instanceof UnionType) {
             return;
@@ -166,6 +169,6 @@ CODE_SAMPLE
         if (!$type instanceof UnionType) {
             return;
         }
-        $this->phpDocTypeChanger->changeReturnType($classMethod, $phpDocInfo, $type);
+        $this->phpDocTypeChanger->changeReturnType($node, $phpDocInfo, $type);
     }
 }
diff --git a/src/Application/VersionResolver.php b/src/Application/VersionResolver.php
index de999b3a8fc..5b3102a9795 100644
--- a/src/Application/VersionResolver.php
+++ b/src/Application/VersionResolver.php
@@ -19,12 +19,12 @@ final class VersionResolver
      * @api
      * @var string
      */
-    public const PACKAGE_VERSION = '97e2433a8378ccc6666c67d4a01ace3abc97589f';
+    public const PACKAGE_VERSION = 'c45f0e2cef30cb0b3090d51fd14dc6ffaa1fc095';
     /**
      * @api
      * @var string
      */
-    public const RELEASE_DATE = '2024-03-23 13:26:17';
+    public const RELEASE_DATE = '2024-03-23 13:36:05';
     /**
      * @var int
      */