diff --git a/Cargo.lock b/Cargo.lock
index ebc1317..2434d86 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -3193,10 +3193,10 @@ version = "0.1.0"
 dependencies = [
  "color",
  "eframe",
+ "rand",
  "rfd",
  "rodio",
  "serde",
- "tinyrand",
  "tokio",
  "toml",
 ]
@@ -3289,12 +3289,6 @@ dependencies = [
  "strict-num",
 ]
 
-[[package]]
-name = "tinyrand"
-version = "0.5.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "87ffaad2263779579369d45f65cad0647c860893d27e4543cdcc1e428d07da2c"
-
 [[package]]
 name = "tinystr"
 version = "0.8.1"
diff --git a/Cargo.toml b/Cargo.toml
index 4e7a366..2421e3b 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -11,4 +11,4 @@ toml = "0.9.7"
 serde = { version = "1.0.227", features = ["derive"] }
 rfd = "0.15.4"
 color = "0.3.2"
-tinyrand = "0.5.0"
\ No newline at end of file
+rand = "0.9.2"
diff --git a/src/grid.rs b/src/grid.rs
index fe814cc..f5ccc71 100644
--- a/src/grid.rs
+++ b/src/grid.rs
@@ -1,9 +1,8 @@
 use color::ColorSpace;
-use std::ops::{DerefMut, RangeInclusive};
-use std::sync::{Arc, Mutex};
+use std::ops::RangeInclusive;
 use eframe::egui;
 use eframe::egui::{Color32, Context, Id, PointerButton, Pos2, Rangef, Sense, Ui, Vec2};
-use tinyrand::{Rand, StdRand};
+use rand::Rng;
 use crate::gui::Showable;
 use crate::scale::Scale;
 use crate::tenori::LOOP_LENGTH;
@@ -19,13 +18,12 @@ pub struct Grid {
     pub open: bool,
     pub timbre: Timbre,
     pub timbre_open: bool,
-    pub color: Color32,
-    pub rand: Arc<Mutex<StdRand>>
+    pub color: Color32
 }
 
 impl Grid {
-    pub fn new(id: Id, rand: Arc<Mutex<StdRand>>) -> Self {
-        let color = Self::random_color(rand.lock().unwrap());
+    pub fn new(id: Id) -> Self {
+        let color = Self::random_color();
 
         Self {
             volume: 1.0,
@@ -35,14 +33,13 @@ impl Grid {
             name: "New Track".to_string(),
             timbre: Timbre::default(),
             timbre_open: false,
-            rand,
             color,
             id
         }
     }
 
-    fn random_color<R: Rand, T: DerefMut<Target=R>>(mut rand: T) -> Color32 {
-        let angle = (rand.next_lim_u32(72) * 5) as f32;
+    fn random_color() -> Color32 {
+        let angle = (rand::rng().random_range(0..72) * 5) as f32;
         let rgb = color::Hsl::convert::<color::Srgb>([angle, 100.0, 50.0]);
         Color32::from_rgb(
             (rgb[0] * 255.0) as u8,
@@ -131,7 +128,7 @@ impl Showable<f32> for Grid {
                 };
 
                 if ui.button("Color").clicked() {
-                    self.color = Self::random_color(self.rand.lock().unwrap());
+                    self.color = Self::random_color();
                 }
             });
 
diff --git a/src/gui.rs b/src/gui.rs
index 29e91ff..9da684b 100644
--- a/src/gui.rs
+++ b/src/gui.rs
@@ -35,7 +35,7 @@ impl Tenori {
 
                 if ui.button("Add track").clicked() {
                     let id = self.window_id();
-                    self.grids.push(Grid::new(id, self.rand.clone()));
+                    self.grids.push(Grid::new(id));
                 }
 
                 ui.with_layout(egui::Layout::right_to_left(egui::Align::Center), |ui| {
diff --git a/src/saveload.rs b/src/saveload.rs
index b69d9e7..bc08cb1 100644
--- a/src/saveload.rs
+++ b/src/saveload.rs
@@ -1,7 +1,5 @@
-use std::sync::{Arc, Mutex};
 use eframe::egui::{Color32, Id};
 use serde::{Deserialize, Serialize};
-use tinyrand::StdRand;
 use crate::grid::Grid;
 use crate::scale::Scale;
 use crate::tenori::Tenori;
@@ -24,7 +22,7 @@ impl From<&Tenori> for PersistedTenori {
 
 impl PersistedTenori {
     pub fn apply_to(self, tenori: &mut Tenori) {
-        tenori.grids = self.grids.into_iter().map(|g| g.into_grid(tenori.window_id(), tenori.rand.clone())).collect();
+        tenori.grids = self.grids.into_iter().map(|g| g.into_grid(tenori.window_id())).collect();
         tenori.tempo = self.tempo;
         tenori.playing = false; // Start paused
         tenori.timer = 0.0; // Start at the beginning of the loop
@@ -56,7 +54,7 @@ impl From<&Grid> for PersistedGrid {
 }
 
 impl PersistedGrid {
-    pub fn into_grid(self, id: Id, rand: Arc<Mutex<StdRand>>) -> Grid {
+    pub fn into_grid(self, id: Id) -> Grid {
         let notes: Vec<_> = self.notes.chars().map(|c| c == '1').collect();
         Grid {
             volume: self.volume,
@@ -66,7 +64,6 @@ impl PersistedGrid {
             open: true,
             timbre_open: false,
             color: Color32::from_rgb(self.color.0, self.color.1, self.color.2),
-            rand,
             notes,
             id
         }
diff --git a/src/tenori.rs b/src/tenori.rs
index f3a5398..f74a3e0 100644
--- a/src/tenori.rs
+++ b/src/tenori.rs
@@ -1,7 +1,5 @@
-use std::sync::{Arc, Mutex};
-use std::time::{Instant, SystemTime, UNIX_EPOCH};
+use std::time::Instant;
 use rodio::OutputStream;
-use tinyrand::{Seeded, StdRand};
 use crate::grid::Grid;
 use crate::dialog::Dialog;
 use crate::noise::Note;
@@ -36,9 +34,6 @@ pub struct Tenori {
     /// If present, we can save to this file without asking the
     /// user to select a file first.
     pub default_filename: Option<String>,
-
-    /// A random number generator
-    pub rand: Arc<Mutex<StdRand>>,
 }
 
 impl Default for Tenori {
@@ -46,8 +41,6 @@ impl Default for Tenori {
         let output_stream = rodio::OutputStreamBuilder::open_default_stream()
             .expect("Open audio output stream");
 
-        let rand = StdRand::seed(SystemTime::now().duration_since(UNIX_EPOCH).unwrap().as_secs());
-
         Self {
             tempo: 90,
             timer: 0.0,
@@ -57,7 +50,6 @@ impl Default for Tenori {
             window_counter: 0,
             dialogs: vec![],
             default_filename: None,
-            rand: Arc::new(Mutex::new(rand)),
             output_stream
         }
     }