diff --git a/mandelbrot.c b/mandelbrot.c
index 8351fb9..5932c04 100644
--- a/mandelbrot.c
+++ b/mandelbrot.c
@@ -8,7 +8,7 @@ int main(int argc, char *argv[]) {
     printf("Error: Could not initialize SDL: %s.\n", SDL_GetError());
     exit(1);
   }
-  screen = SDL_SetVideoMode(640, 480, 32, SDL_SWSURFACE);
+  screen = SDL_SetVideoMode(1280, 800, 32, SDL_SWSURFACE);
 
   if (SDL_MUSTLOCK(screen)) {
     SDL_LockSurface(screen);