diff --git a/composer.json b/composer.json
index d4d8e28..60a605b 100644
--- a/composer.json
+++ b/composer.json
@@ -25,7 +25,7 @@
         "monolog/monolog": "^2.0@dev",
         "phpmd/phpmd": "2.8.2",
         "phpmetrics/phpmetrics": "dev-master@dev",
-        "phpstan/phpstan": "0.12.14",
+        "phpstan/phpstan": "0.12.15",
         "phpunit/phpunit": "*",
         "squizlabs/php_codesniffer": "3.5.4",
         "symfony/yaml": "~2.1|~3.0|~4.0"
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
 {