diff --git a/framework/base/Request.php b/framework/base/Request.php
index b76886ed4a..eb9f805f6d 100644
--- a/framework/base/Request.php
+++ b/framework/base/Request.php
@@ -6,6 +6,7 @@
  */
 
 namespace yii\base;
+
 use Yii;
 
 /**
diff --git a/framework/caching/FileDependency.php b/framework/caching/FileDependency.php
index 11afde36e5..200cdde9bb 100644
--- a/framework/caching/FileDependency.php
+++ b/framework/caching/FileDependency.php
@@ -6,6 +6,7 @@
  */
 
 namespace yii\caching;
+
 use yii\base\InvalidConfigException;
 
 /**
diff --git a/framework/caching/GroupDependency.php b/framework/caching/GroupDependency.php
index 1cf7869f27..bcac858f27 100644
--- a/framework/caching/GroupDependency.php
+++ b/framework/caching/GroupDependency.php
@@ -6,6 +6,7 @@
  */
 
 namespace yii\caching;
+
 use yii\base\InvalidConfigException;
 
 /**
diff --git a/framework/validators/PunycodeAsset.php b/framework/validators/PunycodeAsset.php
index c0c1e2b541..5f6a4110cd 100644
--- a/framework/validators/PunycodeAsset.php
+++ b/framework/validators/PunycodeAsset.php
@@ -6,6 +6,7 @@
  */
 
 namespace yii\validators;
+
 use yii\web\AssetBundle;
 
 /**
diff --git a/framework/validators/ValidationAsset.php b/framework/validators/ValidationAsset.php
index 14d7ad0e95..e9bb79d305 100644
--- a/framework/validators/ValidationAsset.php
+++ b/framework/validators/ValidationAsset.php
@@ -6,6 +6,7 @@
  */
 
 namespace yii\validators;
+
 use yii\web\AssetBundle;
 
 /**
diff --git a/framework/widgets/ActiveFormAsset.php b/framework/widgets/ActiveFormAsset.php
index 5acb5e1902..94b00e5143 100644
--- a/framework/widgets/ActiveFormAsset.php
+++ b/framework/widgets/ActiveFormAsset.php
@@ -6,6 +6,7 @@
  */
 
 namespace yii\widgets;
+
 use yii\web\AssetBundle;
 
 /**