diff --git a/main.cpp b/main.cpp
index fbd66a5..0e778d5 100644
--- a/main.cpp
+++ b/main.cpp
@@ -92,6 +92,10 @@ void linkVBO() {
     glEnableVertexAttribArray(0); 
 }
 
+void framebuffer_size_callback(GLFWwindow* window, int width, int height)
+{
+    glViewport(0, 0, width, height);
+}  
 
 int main(int argc, char** argv) {
 
@@ -100,7 +104,7 @@ int main(int argc, char** argv) {
     if (!glfwInit())
         return -1;
 
-    window = glfwCreateWindow(640, 480, "Hello World", NULL, NULL);
+    window = glfwCreateWindow(800, 600, "Hello World", NULL, NULL);
 
     if (!window)
     {
@@ -119,6 +123,9 @@ int main(int argc, char** argv) {
 
     glViewport(0, 0, 800, 600);
 
+
+    glfwSetFramebufferSizeCallback(window, framebuffer_size_callback);  
+
     unsigned int shaderProgramm = compShader();
     unsigned int VAO = initVAO();