diff --git a/README.md b/README.md
index ad876e6c..4b5fae47 100755
--- a/README.md
+++ b/README.md
@@ -412,12 +412,12 @@ Example using ast
 
 ```php
 
-use TBela\CSS\Ast\NodeWalker;
+use TBela\CSS\Ast\Traverser;
 use TBela\CSS\Parser;
 use TBela\CSS\Renderer;
 
 $parser = (new Parser())->load('ast/media.css');
-$traverser = new NodeWalker();
+$traverser = new Traverser();
 $renderer = new Renderer(['remove_empty_nodes' => true]);
 
 $ast = $parser->getAst();
@@ -427,7 +427,7 @@ $traverser->on('enter', function ($node) {
 
     if ($node->type == 'AtRule' && $node->name == 'media' && $node->value == 'print') {
 
-        return NodeWalker::IGNORE_NODE;
+        return Traverser::IGNORE_NODE;
     }
 });
 
@@ -439,12 +439,12 @@ Example using an Element instance
 
 ```php
 
-use TBela\CSS\Ast\NodeWalker;
+use TBela\CSS\Ast\Traverser;
 use TBela\CSS\Parser;
 use TBela\CSS\Renderer;
 
 $parser = (new Parser())->load('ast/media.css');
-$traverser = new NodeWalker();
+$traverser = new Traverser();
 $renderer = new Renderer(['remove_empty_nodes' => true]);
 
 $element = $parser->parse();
@@ -454,7 +454,7 @@ $traverser->on('enter', function ($node) {
 
     if ($node->type == 'AtRule' && $node->name == 'media' && $node->value == 'print') {
 
-        return NodeWalker::IGNORE_NODE;
+        return Traverser::IGNORE_NODE;
     }
 });
 
diff --git a/docs/README.md b/docs/README.md
index 5ee68532..4d3470a7 100755
--- a/docs/README.md
+++ b/docs/README.md
@@ -412,12 +412,12 @@ Example using ast
 
 ```php
 
-use TBela\CSS\Ast\NodeWalker;
+use TBela\CSS\Ast\Traverser;
 use TBela\CSS\Parser;
 use TBela\CSS\Renderer;
 
 $parser = (new Parser())->load('ast/media.css');
-$traverser = new NodeWalker();
+$traverser = new Traverser();
 $renderer = new Renderer(['remove_empty_nodes' => true]);
 
 $ast = $parser->getAst();
@@ -427,7 +427,7 @@ $traverser->on('enter', function ($node) {
 
     if ($node->type == 'AtRule' && $node->name == 'media' && $node->value == 'print') {
 
-        return NodeWalker::IGNORE_NODE;
+        return Traverser::IGNORE_NODE;
     }
 });
 
@@ -439,12 +439,12 @@ Example using an Element instance
 
 ```php
 
-use TBela\CSS\Ast\NodeWalker;
+use TBela\CSS\Ast\Traverser;
 use TBela\CSS\Parser;
 use TBela\CSS\Renderer;
 
 $parser = (new Parser())->load('ast/media.css');
-$traverser = new NodeWalker();
+$traverser = new Traverser();
 $renderer = new Renderer(['remove_empty_nodes' => true]);
 
 $element = $parser->parse();
@@ -454,7 +454,7 @@ $traverser->on('enter', function ($node) {
 
     if ($node->type == 'AtRule' && $node->name == 'media' && $node->value == 'print') {
 
-        return NodeWalker::IGNORE_NODE;
+        return Traverser::IGNORE_NODE;
     }
 });
 
diff --git a/docs/traverser.md b/docs/traverser.md
index 714ec57a..22cbaca8 100755
--- a/docs/traverser.md
+++ b/docs/traverser.md
@@ -22,15 +22,15 @@ add a callback for the specified event
 
 ```php
 
-use TBela\CSS\Ast\NodeWalker;
+use TBela\CSS\Ast\Traverser;
 
-$traverser = new NodeWalker();
+$traverser = new Traverser();
 $callable = function ($node) {
 
     // remove @media print {}
     if ($node->type == 'AtRule' && $node->value == 'print') {
     
-        return NodeWalker::IGNORE_NODE;
+        return Traverser::IGNORE_NODE;
     }
 };
 
@@ -52,15 +52,15 @@ remove a callback for the specified event
 
 ```php
 
-use TBela\CSS\Ast\NodeWalker;
+use TBela\CSS\Ast\Traverser;
 
-$traverser = new NodeWalker();
+$traverser = new Traverser();
 $callable = function ($node) {
 
     // remove @media print {}
     if ($node->type == 'AtRule' && $node->value == 'print') {
     
-        return NodeWalker::IGNORE_NODE;
+        return Traverser::IGNORE_NODE;
     }
 };