diff --git a/framework/helpers/BaseMarkdown.php b/framework/helpers/BaseMarkdown.php
index 59bb3ec..6d8ee39 100644
--- a/framework/helpers/BaseMarkdown.php
+++ b/framework/helpers/BaseMarkdown.php
@@ -82,7 +82,7 @@ class BaseMarkdown
      * @return \cebe\markdown\Parser
      * @throws \yii\base\InvalidParamException when an undefined flavor is given.
      */
-    private static function getParser($flavor)
+    protected static function getParser($flavor)
     {
         /** @var \cebe\markdown\Markdown $parser */
         if (!isset(static::$flavors[$flavor])) {
diff --git a/framework/helpers/BaseUrl.php b/framework/helpers/BaseUrl.php
index d43882f..eb97526 100644
--- a/framework/helpers/BaseUrl.php
+++ b/framework/helpers/BaseUrl.php
@@ -108,7 +108,7 @@ class BaseUrl
      * @return string normalized route suitable for UrlManager
      * @throws InvalidParamException a relative route is given while there is no active controller
      */
-    private static function normalizeRoute($route)
+    protected static function normalizeRoute($route)
     {
         $route = (string) $route;
         if (strncmp($route, '/', 1) === 0) {
diff --git a/framework/rest/RateLimiter.php b/framework/rest/RateLimiter.php
index d668e6d..8226f59 100644
--- a/framework/rest/RateLimiter.php
+++ b/framework/rest/RateLimiter.php
@@ -8,7 +8,6 @@
 namespace yii\rest;
 
 use yii\base\Component;
-use yii\base\Action;
 use yii\web\Request;
 use yii\web\Response;
 use yii\web\TooManyRequestsHttpException;
@@ -37,7 +36,7 @@ class RateLimiter extends Component
      * @param RateLimitInterface $user the current user
      * @param Request $request
      * @param Response $response
-     * @param Action $action the action to be executed
+     * @param \yii\base\Action $action the action to be executed
      * @throws TooManyRequestsHttpException if rate limit exceeds
      */
     public function check($user, $request, $response, $action)
diff --git a/framework/web/UploadedFile.php b/framework/web/UploadedFile.php
index c7648c1..bcfb989 100644
--- a/framework/web/UploadedFile.php
+++ b/framework/web/UploadedFile.php
@@ -56,6 +56,7 @@ class UploadedFile extends Object
      */
     public $error;
 
+
     /**
      * String output.
      * This is PHP magic method that returns string representation of an object.
@@ -80,7 +81,6 @@ class UploadedFile extends Object
     public static function getInstance($model, $attribute)
     {
         $name = Html::getInputName($model, $attribute);
-
         return static::getInstanceByName($name);
     }
 
@@ -95,7 +95,6 @@ class UploadedFile extends Object
     public static function getInstances($model, $attribute)
     {
         $name = Html::getInputName($model, $attribute);
-
         return static::getInstancesByName($name);
     }
 
@@ -108,8 +107,7 @@ class UploadedFile extends Object
      */
     public static function getInstanceByName($name)
     {
-        $files = static::loadFiles();
-
+        $files = self::loadFiles();
         return isset($files[$name]) ? $files[$name] : null;
     }
 
@@ -124,7 +122,7 @@ class UploadedFile extends Object
      */
     public static function getInstancesByName($name)
     {
-        $files = static::loadFiles();
+        $files = self::loadFiles();
         if (isset($files[$name])) {
             return [$files[$name]];
         }
@@ -134,7 +132,6 @@ class UploadedFile extends Object
                 $results[] = self::$_files[$key];
             }
         }
-
         return $results;
     }
 
@@ -166,7 +163,6 @@ class UploadedFile extends Object
                 return copy($this->tempName, $file);
             }
         }
-
         return false;
     }
 
@@ -209,7 +205,6 @@ class UploadedFile extends Object
                 }
             }
         }
-
         return self::$_files;
     }