diff --git a/composer.json b/composer.json
index d4d8e28..dcdcdab 100644
--- a/composer.json
+++ b/composer.json
@@ -23,7 +23,7 @@
         "codacy/coverage": "dev-master",
         "friendsofphp/php-cs-fixer": "dev-master@dev",
         "monolog/monolog": "^2.0@dev",
-        "phpmd/phpmd": "2.8.2",
+        "phpmd/phpmd": "2.9.1",
         "phpmetrics/phpmetrics": "dev-master@dev",
         "phpstan/phpstan": "0.12.14",
         "phpunit/phpunit": "*",
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
 {