diff --git a/src/font.rs b/src/font.rs
index 9ade7da..b56ed59 100644
--- a/src/font.rs
+++ b/src/font.rs
@@ -5,7 +5,7 @@ use font_kit::font::Font;
 use font_kit::hinting::HintingOptions;
 use pathfinder_geometry::transform2d::Transform2F;
 use pathfinder_geometry::vector::{vec2f, vec2i};
-use servicepoint2::{PixelGrid, TILE_SIZE};
+use servicepoint2::{Grid, PixelGrid, TILE_SIZE};
 
 const DEFAULT_FONT_FILE: &[u8] = include_bytes!("../Web437_IBM_BIOS.woff");
 
@@ -16,7 +16,7 @@ pub struct BitmapFont {
 impl BitmapFont {
     pub fn load(font: Font) -> BitmapFont {
         let mut bitmaps = core::array::from_fn(|_| {
-            PixelGrid::new(TILE_SIZE as usize, TILE_SIZE as usize)
+            PixelGrid::new(TILE_SIZE, TILE_SIZE)
         });
 
         for char_code in u8::MIN..u8::MAX {
@@ -43,9 +43,9 @@ impl BitmapFont {
             assert_eq!(canvas.pixels.len(), 64);
             assert_eq!(canvas.stride, 8);
 
-            for y in 0..TILE_SIZE as usize {
-                for x in 0..TILE_SIZE as usize {
-                    let index = x + y * TILE_SIZE as usize;
+            for y in 0..TILE_SIZE {
+                for x in 0..TILE_SIZE {
+                    let index = x + y * TILE_SIZE;
                     let canvas_val = canvas.pixels[index] != 0;
                     bitmaps[char_code as usize].set(x, y, canvas_val);
                 }
diff --git a/src/gui.rs b/src/gui.rs
index 295507f..cedd361 100644
--- a/src/gui.rs
+++ b/src/gui.rs
@@ -4,9 +4,7 @@ use std::sync::RwLock;
 use log::{info, warn};
 use pixels::wgpu::TextureFormat;
 use pixels::{Pixels, PixelsBuilder, SurfaceTexture};
-use servicepoint2::{
-    ByteGrid, PixelGrid, PIXEL_HEIGHT, PIXEL_WIDTH, TILE_SIZE,
-};
+use servicepoint2::{ByteGrid, PixelGrid, PIXEL_HEIGHT, PIXEL_WIDTH, TILE_SIZE, Grid};
 use winit::application::ApplicationHandler;
 use winit::dpi::LogicalSize;
 use winit::event::WindowEvent;
@@ -25,7 +23,7 @@ pub struct App<'t> {
     cli: &'t Cli,
 }
 
-const SPACER_HEIGHT: u16 = 4;
+const SPACER_HEIGHT: usize = 4;
 
 #[derive(Debug)]
 pub enum AppEvents {
@@ -56,18 +54,18 @@ impl<'t> App<'t> {
         let mut frame = pixels.frame_mut().chunks_exact_mut(4);
         let display = self.display.read().unwrap();
         let luma = self.luma.read().unwrap();
-        for y in 0..PIXEL_HEIGHT as usize {
-            if self.cli.spacers && y != 0 && y % TILE_SIZE as usize == 0 {
+        for y in 0..PIXEL_HEIGHT {
+            if self.cli.spacers && y != 0 && y % TILE_SIZE == 0 {
                 // cannot just frame.skip(PIXEL_WIDTH as usize * SPACER_HEIGHT as usize) because of typing
-                for _ in 0..PIXEL_WIDTH as usize * SPACER_HEIGHT as usize {
+                for _ in 0..PIXEL_WIDTH * SPACER_HEIGHT {
                     frame.next().unwrap();
                 }
             }
 
-            for x in 0..PIXEL_WIDTH as usize {
+            for x in 0..PIXEL_WIDTH {
                 let is_set = display.get(x, y);
                 let brightness =
-                    luma.get(x / TILE_SIZE as usize, y / TILE_SIZE as usize);
+                    luma.get(x / TILE_SIZE, y / TILE_SIZE);
 
                 let color = if is_set {
                     [
@@ -98,7 +96,7 @@ impl ApplicationHandler<AppEvents> for App<'_> {
             PIXEL_HEIGHT
         };
 
-        let size = LogicalSize::new(PIXEL_WIDTH, height);
+        let size = LogicalSize::new(PIXEL_WIDTH as u16, height as u16);
         let attributes = Window::default_attributes()
             .with_title("servicepoint-simulator")
             .with_inner_size(size)
diff --git a/src/main.rs b/src/main.rs
index 8e74d2a..d6d07b1 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -7,10 +7,7 @@ use std::time::Duration;
 
 use clap::Parser;
 use log::{info, warn, LevelFilter};
-use servicepoint2::{
-    ByteGrid, Command, PixelGrid, PIXEL_HEIGHT, PIXEL_WIDTH, TILE_HEIGHT,
-    TILE_WIDTH,
-};
+use servicepoint2::{ByteGrid, Command, PixelGrid, PIXEL_HEIGHT, PIXEL_WIDTH, TILE_HEIGHT, TILE_WIDTH, Grid};
 use winit::event_loop::{ControlFlow, EventLoop};
 
 use crate::execute_command::execute_command;
@@ -53,11 +50,11 @@ fn main() {
         .expect("could not enter non blocking mode");
 
     let display = RwLock::new(PixelGrid::new(
-        PIXEL_WIDTH as usize,
-        PIXEL_HEIGHT as usize,
+        PIXEL_WIDTH,
+        PIXEL_HEIGHT,
     ));
 
-    let mut luma = ByteGrid::new(TILE_WIDTH as usize, TILE_HEIGHT as usize);
+    let mut luma = ByteGrid::new(TILE_WIDTH, TILE_HEIGHT);
     luma.fill(u8::MAX);
     let luma = RwLock::new(luma);