diff --git a/pyrousel/appwindow.py b/pyrousel/appwindow.py
index dfbfa2f..95962ce 100644
--- a/pyrousel/appwindow.py
+++ b/pyrousel/appwindow.py
@@ -46,6 +46,7 @@ def __init__(self, width: int = 1280, height: int = 720, enable_gui: bool = True
         else:
             glfw.make_context_current(self.__win)
             glfw.set_key_callback(self.__win, self.OnKeyCallback)
+            glfw.set_framebuffer_size_callback(self.__win, self.OnWindowResizeCallback)
             glfw.swap_interval(int(self.__enable_vsync))
 
         # App user interface (IMGui)
@@ -245,6 +246,14 @@ def OnKeyCallback(self, window, key, scancode, action, mods) -> None:
         if key == glfw.KEY_X and action == glfw.PRESS:
             self.draw_gui = not self.draw_gui
 
+    def OnWindowResizeCallback(self, window: glfw._GLFWwindow, width: int, height: int) -> None:
+        self.__width = width
+        self.__height = height
+        self.__aspec_ratio = width / height
+
+        if self.camera is not None:
+            self.camera.aspect = self.__aspec_ratio
+
     def Quit(self) -> None:
         self.gui.Shutdown()
         glfw.terminate()