diff --git a/composer.json b/composer.json
index d4d8e28..66c3739 100644
--- a/composer.json
+++ b/composer.json
@@ -13,7 +13,7 @@
     "require": {
         "php": ">=7.2.0",
         "ext-pdo": "*",
-        "atk4/ui": "2.0.2",
+        "atk4/ui": "2.1.0",
         "maximebf/debugbar": "1.15.1"
     },
     "require-dev":{
diff --git a/demos/example-ajax.php b/demos/example-ajax.php
index 611f702..7b794cc 100644
--- a/demos/example-ajax.php
+++ b/demos/example-ajax.php
@@ -3,7 +3,6 @@
 require_once 'bootstrap.php';
 
 use atk4\ui\App;
-use ATK4PHPDebugBar\DebugBar;
 
 class User extends \atk4\data\Model
 {
diff --git a/demos/example-logger.php b/demos/example-logger.php
index 32e5dc9..07a939a 100644
--- a/demos/example-logger.php
+++ b/demos/example-logger.php
@@ -3,7 +3,6 @@
 require_once 'bootstrap.php';
 
 use atk4\ui\App;
-use ATK4PHPDebugBar\DebugBar;
 use Monolog\Handler\StreamHandler;
 use Monolog\Logger;
 
diff --git a/demos/example-persistence.php b/demos/example-persistence.php
index f27e59b..cea6d2f 100644
--- a/demos/example-persistence.php
+++ b/demos/example-persistence.php
@@ -3,7 +3,6 @@
 require_once 'bootstrap.php';
 
 use atk4\ui\App;
-use ATK4PHPDebugBar\DebugBar;
 
 class User extends \atk4\data\Model
 {