diff --git a/Cargo.toml b/Cargo.toml
index eaa7a54..e727585 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -11,10 +11,12 @@ edition = "2021"
 
 [dependencies]
 log = "0.4.22"
-atomic = "0.5.1"
+atomic = "0.6.0"
 cgmath = "0.18.0"
 libc = "0.2.69"
 
+bytemuck = { version = "1.13.1", features = ["derive"] }
+
 
 # framebuffer
 memmap2 = { version = "0.9.4", optional = true }
diff --git a/examples/demo.rs b/examples/demo.rs
index fd700e3..69d87a6 100644
--- a/examples/demo.rs
+++ b/examples/demo.rs
@@ -28,7 +28,10 @@ use std::sync::Mutex;
 use std::thread::sleep;
 use std::time::Duration;
 
-#[derive(Copy, Clone, PartialEq)]
+use bytemuck::NoUninit;
+
+#[derive(Copy, Clone, PartialEq, NoUninit)]
+#[repr(i64)]
 enum DrawMode {
     Draw(u32),
     Erase(u32),