diff --git a/src/bus.rs b/src/bus.rs
index e257fd0..20283da 100644
--- a/src/bus.rs
+++ b/src/bus.rs
@@ -7,6 +7,7 @@ use super::serial::Serial;
 use super::sound::Sound;
 use super::timer::Timer;
 use super::work_ram::{VariableWorkRAM, WorkRAM};
+use std::{convert::TryInto, fs::File, io::Read};
 
 #[derive(Debug, Clone)]
 pub struct Bus {
@@ -40,9 +41,15 @@ impl Default for Bus {
 }
 
 impl Bus {
-    pub fn with_boot() -> Self {
+    pub fn with_boot(path: &str) -> Self {
+        let mut file = File::open(path).unwrap();
+        let mut buf = Vec::with_capacity(256);
+        file.read_to_end(&mut buf).unwrap();
+
+        let boot_rom: [u8; 256] = buf.try_into().unwrap();
+
         Self {
-            boot: Some(include_bytes!("../bin/DMG_ROM.bin").to_owned()),
+            boot: Some(boot_rom),
             ..Default::default()
         }
     }
diff --git a/src/cpu.rs b/src/cpu.rs
index 1fa7cb3..cbd05ed 100644
--- a/src/cpu.rs
+++ b/src/cpu.rs
@@ -34,9 +34,9 @@ impl Cpu {
         }
     }
 
-    pub fn boot_new() -> Self {
+    pub fn boot_new(path: &str) -> Self {
         Self {
-            bus: Bus::with_boot(),
+            bus: Bus::with_boot(path),
             ..Default::default()
         }
     }
diff --git a/src/main.rs b/src/main.rs
index 1f2d22a..c03874f 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -1,6 +1,7 @@
 use anyhow::{anyhow, Result};
 use gb::cpu::Cpu as LR35902;
 use pixels::{Pixels, SurfaceTexture};
+use std::env::args;
 use winit::{
     dpi::LogicalSize,
     event::{Event, VirtualKeyCode},
@@ -19,7 +20,12 @@ fn main() -> Result<()> {
     let mut input = WinitInputHelper::new();
     let window = create_window(&event_loop)?;
     let mut pixels = create_pixels(&window)?;
-    let mut game_boy = LR35902::new();
+
+    let mut game_boy = match args().nth(1) {
+        Some(boot_path) => LR35902::boot_new(&boot_path),
+        None => LR35902::new(),
+    };
+
     game_boy.load_cartridge("bin/cpu_instrs.gb");
 
     event_loop.run(move |event, _, control_flow| {