diff --git a/src/Controller/ControllerInterface.php b/src/Controller/ControllerInterface.php
deleted file mode 100644
index 22d2f8f..0000000
--- a/src/Controller/ControllerInterface.php
+++ /dev/null
@@ -1,8 +0,0 @@
-<?php namespace MapGuesser\Controller;
-
-use MapGuesser\View\ViewBase;
-
-interface ControllerInterface
-{
-    public function run(): ViewBase;
-}
diff --git a/src/Controller/GameController.php b/src/Controller/GameController.php
index c036adb..67310c2 100644
--- a/src/Controller/GameController.php
+++ b/src/Controller/GameController.php
@@ -1,12 +1,13 @@
 <?php namespace MapGuesser\Controller;
 
+use MapGuesser\Interfaces\Controller\IController;
 use MapGuesser\Util\Geo\Bounds;
 use MapGuesser\View\HtmlView;
 use MapGuesser\View\JsonView;
-use MapGuesser\View\ViewBase;
+use MapGuesser\Interfaces\View\IView;
 use mysqli;
 
-class GameController implements ControllerInterface
+class GameController implements IController
 {
     private mysqli $mysql;
 
@@ -22,7 +23,7 @@ class GameController implements ControllerInterface
         $this->jsonResponse = $jsonResponse;
     }
 
-    public function run(): ViewBase
+    public function run(): IView
     {
         $bounds = $this->getMapBounds();
 
diff --git a/src/Controller/PositionController.php b/src/Controller/PositionController.php
index 24d4b13..9687a72 100644
--- a/src/Controller/PositionController.php
+++ b/src/Controller/PositionController.php
@@ -1,12 +1,13 @@
 <?php namespace MapGuesser\Controller;
 
+use MapGuesser\Interfaces\Controller\IController;
 use MapGuesser\Util\Geo\Position;
 use MapGuesser\View\JsonView;
-use MapGuesser\View\ViewBase;
+use MapGuesser\Interfaces\View\IView;
 use mysqli;
 use RestClient\Client;
 
-class PositionController implements ControllerInterface
+class PositionController implements IController
 {
     const NUMBER_OF_ROUNDS = 5;
     const MAX_SCORE = 1000;
@@ -21,7 +22,7 @@ class PositionController implements ControllerInterface
         $this->mysql = new mysqli($_ENV['DB_HOST'], $_ENV['DB_USER'], $_ENV['DB_PASSWORD'], $_ENV['DB_NAME']);
     }
 
-    public function run(): ViewBase
+    public function run(): IView
     {
         if (!isset($_SESSION['state']) || $_SESSION['state']['mapId'] !== $this->mapId) {
             $data = ['error' => 'No valid session found!'];
diff --git a/src/Interfaces/Controller/IController.php b/src/Interfaces/Controller/IController.php
new file mode 100644
index 0000000..07caeeb
--- /dev/null
+++ b/src/Interfaces/Controller/IController.php
@@ -0,0 +1,8 @@
+<?php namespace MapGuesser\Interfaces\Controller;
+
+use MapGuesser\Interfaces\View\IView;
+
+interface IController
+{
+    public function run(): IView;
+}
diff --git a/src/Interfaces/View/IView.php b/src/Interfaces/View/IView.php
new file mode 100644
index 0000000..7cedc29
--- /dev/null
+++ b/src/Interfaces/View/IView.php
@@ -0,0 +1,10 @@
+<?php namespace MapGuesser\Interfaces\View;
+
+interface IView
+{
+    public function &getData(): array;
+
+    public function &render(): string;
+
+    public function getContentType(): string;
+}
diff --git a/src/View/ViewBase.php b/src/View/ViewBase.php
index 9bad81f..89a6eee 100644
--- a/src/View/ViewBase.php
+++ b/src/View/ViewBase.php
@@ -1,6 +1,8 @@
 <?php namespace MapGuesser\View;
 
-abstract class ViewBase
+use MapGuesser\Interfaces\View\IView;
+
+abstract class ViewBase implements IView
 {
     protected array $data;