diff --git a/.cargo/config.toml b/.cargo/config.toml
new file mode 100644
index 0000000..d5502cf
--- /dev/null
+++ b/.cargo/config.toml
@@ -0,0 +1,3 @@
+[build]
+target = "x86_64-unknown-linux-musl"
+rustflags = ["-C","target-cpu=native"]
diff --git a/Cargo.toml b/Cargo.toml
index 8d82553..3c89e82 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -2,11 +2,23 @@
 name = "fractal"
 version = "0.1.0"
 authors = ["alexandre <abour@localhost.com>"]
-edition = "2018"
+edition = "2021"
 
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 
 [dependencies]
-tokio = { version = "0.3", features = ["full"] }
-image = "0.23.12"
-rand = "0.7.3"
+tokio = { version = "1.43.0", features = ["rt-multi-thread", "sync", "macros"] }
+image = "0.25.5"
+rand = "0.9.0"
+
+[profile.release]
+opt-level = 3
+debug = false
+debug-assertions = false
+overflow-checks = false
+codegen-units = 1
+lto = "fat"
+panic = 'abort'
+incremental = false
+rpath = false
+strip = true
diff --git a/src/main.rs b/src/main.rs
index 0c8ed6e..ef06d68 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -1,11 +1,11 @@
 mod color;
 
 use image;
-use rand::{thread_rng, Rng};
+use rand::{rng, Rng};
 use tokio::sync::mpsc;
 
-const WIDTH: u32 = 1024;
-const HEIGHT: u32 = 1024;
+const WIDTH: u32 = 3840;
+const HEIGHT: u32 = 2160;
 const BUF_SIZE: u32 = WIDTH * HEIGHT * 3;
 const NB_SAMPLES: u32 = 50;
 const SIZE: f64 = 0.000000001;
@@ -55,7 +55,7 @@ fn write_line(buf: &mut Vec<u8>, line: &Vec<u8>, line_number: u32) {
 }
 
 fn render_line(line_number: u32, px: f64, py: f64) -> (Vec<u8>, u32) {
-    let mut rng = thread_rng();
+    let mut rng = rng();
 
     let line_size = WIDTH * 3;
     let mut line: Vec<u8> = vec![0; line_size as usize];
@@ -63,9 +63,9 @@ fn render_line(line_number: u32, px: f64, py: f64) -> (Vec<u8>, u32) {
     for x in 0..WIDTH {
         let sampled_colours = (0..NB_SAMPLES)
             .map(|_| {
-                let nx = SIZE * (((x as f64) + rng.gen_range(0., 1.0)) / (WIDTH as f64)) + px;
+                let nx = SIZE * (((x as f64) + rng.random_range(0. .. 1.0)) / (WIDTH as f64)) + px;
                 let ny =
-                    SIZE * (((line_number as f64) + rng.gen_range(0., 1.0)) / (HEIGHT as f64)) + py;
+                    SIZE * (((line_number as f64) + rng.random_range(0. .. 1.0)) / (HEIGHT as f64)) + py;
                 let (m_res, m_iter) = mandelbrot_iter(nx, ny);
                 paint(m_res, m_iter)
             })