diff --git a/composer.json b/composer.json
index afc6e2e..6489851 100644
--- a/composer.json
+++ b/composer.json
@@ -24,7 +24,7 @@
         "phpdocumentor/reflection-common": "~2.2",
         "phpstan/phpdoc-parser": "~1.23",
         "voku/simple-cache": "~5.0",
-        "nikic/php-parser": "~4.18"
+        "nikic/php-parser": "^4.18 || ^5"
     },
     "require-dev": {
         "phpunit/phpunit": "~9.6",
diff --git a/src/voku/SimplePhpParser/Model/BasePHPElement.php b/src/voku/SimplePhpParser/Model/BasePHPElement.php
index 55fc0ac..0668d5c 100644
--- a/src/voku/SimplePhpParser/Model/BasePHPElement.php
+++ b/src/voku/SimplePhpParser/Model/BasePHPElement.php
@@ -55,7 +55,7 @@ protected function getConstantFQN(NodeAbstract $node, string $nodeName): string
             &&
             $parent->name instanceof Name
         ) {
-            $namespace = '\\' . \implode('\\', $parent->name->getParts()) . '\\';
+            $namespace = '\\' . $parent->name->toString() . '\\';
         } else {
             $namespace = '';
         }
@@ -81,10 +81,9 @@ protected static function getFQN($node): string
             \property_exists($node, 'namespacedName')
         ) {
             if ($node->namespacedName) {
-                $fqn = \implode('\\', $node->namespacedName->getParts());
+                $fqn = $node->namespacedName->toString();
             } elseif (\property_exists($node, 'name') && $node->name) {
-                var_dump($node->name);
-                $fqn =  $node->name->name;
+                $fqn = $node->name instanceof Name ? $node->name->toString() : (string) $node->name;
             }
         }
 
@@ -97,6 +96,8 @@ protected static function getFQN($node): string
 
     protected function prepareNode(Node $node): void
     {
-        $this->line = $node->getLine();
+        $this->line = method_exists($node, 'getStartLine')
+            ? $node->getStartLine()
+            : $node->getLine(); // @phpstan-ignore-line getLine() was removed in PHP-Parser v5
     }
 }
diff --git a/src/voku/SimplePhpParser/Model/PHPClass.php b/src/voku/SimplePhpParser/Model/PHPClass.php
index 8669f0c..04d0070 100644
--- a/src/voku/SimplePhpParser/Model/PHPClass.php
+++ b/src/voku/SimplePhpParser/Model/PHPClass.php
@@ -79,7 +79,7 @@ public function readObjectFromPhpNode($node, $dummy = null): self
         $this->collectTags($node);
 
         if (!empty($node->extends)) {
-            $classExtended = implode('\\', $node->extends->getParts());
+            $classExtended = $node->extends->toString();
             /** @noinspection PhpSillyAssignmentInspection - hack for phpstan */
             /** @var class-string $classExtended */
             $classExtended = $classExtended;
@@ -121,7 +121,7 @@ public function readObjectFromPhpNode($node, $dummy = null): self
 
         if (!empty($node->implements)) {
             foreach ($node->implements as $interfaceObject) {
-                $interfaceFQN = implode('\\', $interfaceObject->getParts());
+                $interfaceFQN = $interfaceObject->toString();
                 /** @noinspection PhpSillyAssignmentInspection - hack for phpstan */
                 /** @var class-string $interfaceFQN */
                 $interfaceFQN = $interfaceFQN;
diff --git a/src/voku/SimplePhpParser/Model/PHPConst.php b/src/voku/SimplePhpParser/Model/PHPConst.php
index 9db7005..b5d8112 100644
--- a/src/voku/SimplePhpParser/Model/PHPConst.php
+++ b/src/voku/SimplePhpParser/Model/PHPConst.php
@@ -144,7 +144,7 @@ protected function getConstantFQN(NodeAbstract $node, string $nodeName): string
             &&
             $parentParentNode->name instanceof Name
         ) {
-            $namespace = '\\' . \implode('\\', $parentParentNode->name->getParts()) . '\\';
+            $namespace = '\\' . $parentParentNode->name->toString() . '\\';
         } else {
             $namespace = '';
         }
diff --git a/src/voku/SimplePhpParser/Model/PHPEnum.php b/src/voku/SimplePhpParser/Model/PHPEnum.php
index f56bf9c..5860347 100644
--- a/src/voku/SimplePhpParser/Model/PHPEnum.php
+++ b/src/voku/SimplePhpParser/Model/PHPEnum.php
@@ -89,7 +89,7 @@ public function readObjectFromPhpNode($node, $dummy = null): self
 
         if (!empty($node->implements)) {
             foreach ($node->implements as $interfaceObject) {
-                $interfaceFQN = \implode('\\', $interfaceObject->getParts());
+                $interfaceFQN = $interfaceObject->toString();
                 /** @noinspection PhpSillyAssignmentInspection - hack for phpstan */
                 /** @var class-string $interfaceFQN */
                 $interfaceFQN = $interfaceFQN;
diff --git a/src/voku/SimplePhpParser/Model/PHPInterface.php b/src/voku/SimplePhpParser/Model/PHPInterface.php
index 9da54a0..655fb33 100644
--- a/src/voku/SimplePhpParser/Model/PHPInterface.php
+++ b/src/voku/SimplePhpParser/Model/PHPInterface.php
@@ -70,7 +70,7 @@ public function readObjectFromPhpNode($node, $dummy = null): self
 
         if (!empty($node->extends)) {
             /** @var class-string $interfaceExtended */
-            $interfaceExtended = \implode('\\', $node->extends[0]->getParts());
+            $interfaceExtended = $node->extends[0]->toString();
             $this->parentInterfaces[] = $interfaceExtended;
         }
 
diff --git a/src/voku/SimplePhpParser/Parsers/Helper/Utils.php b/src/voku/SimplePhpParser/Parsers/Helper/Utils.php
index 754d471..2ab60ae 100644
--- a/src/voku/SimplePhpParser/Parsers/Helper/Utils.php
+++ b/src/voku/SimplePhpParser/Parsers/Helper/Utils.php
@@ -114,7 +114,7 @@ public static function getPhpParserValueFromNode(
                     $node->value->name
                 ) {
                     if ($node->value->name instanceof \PhpParser\Node\Name) {
-                        $value = implode('\\', $node->value->name->getParts()) ?: $node->value->name->name;
+                        $value = $node->value->name->toString();
                     } else {
                         $value = \is_string($node->value->name) ? $node->value->name : (string) $node->value->name;
                     }
diff --git a/src/voku/SimplePhpParser/Parsers/PhpCodeParser.php b/src/voku/SimplePhpParser/Parsers/PhpCodeParser.php
index 1a37ab2..9303a37 100644
--- a/src/voku/SimplePhpParser/Parsers/PhpCodeParser.php
+++ b/src/voku/SimplePhpParser/Parsers/PhpCodeParser.php
@@ -200,7 +200,7 @@ public static function process(
         ParserContainer $parserContainer,
         ASTVisitor $visitor
     ) {
-        $parser = (new ParserFactory())->create(ParserFactory::PREFER_PHP7);
+        $parser = (new ParserFactory())->createForNewestSupportedVersion();
 
         $errorHandler = new ParserErrorHandler();