diff --git a/Cargo.lock b/Cargo.lock
index 739db4d..8a80c72 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -2,6 +2,12 @@
 # It is not intended for manual editing.
 version = 4
 
+[[package]]
+name = "bitflags"
+version = "2.9.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "1b8e56985ec62d17e9c1001dc89c88ecd7dc08e47eba5ec7c29c7b5eeecde967"
+
 [[package]]
 name = "cfg-if"
 version = "1.0.1"
@@ -10,12 +16,13 @@ checksum = "9555578bc9e57714c812a1f84e4fc5b4d21fcb063490c624de019f7464c91268"
 
 [[package]]
 name = "getrandom"
-version = "0.2.16"
+version = "0.3.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "335ff9f135e4384c8150d6f27c6daed433577f86b4750418338c01a1a2528592"
+checksum = "26145e563e54f2cadc477553f1ec5ee650b00862f0a58bcd12cbdc5f0ea2d2f4"
 dependencies = [
  "cfg-if",
  "libc",
+ "r-efi",
  "wasi",
 ]
 
@@ -53,21 +60,26 @@ dependencies = [
 ]
 
 [[package]]
-name = "rand"
-version = "0.8.5"
+name = "r-efi"
+version = "5.3.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "34af8d1a0e25924bc5b7c43c079c942339d8f0a8b57c39049bef581b46327404"
+checksum = "69cdb34c158ceb288df11e18b4bd39de994f6657d83847bdffdbd7f346754b0f"
+
+[[package]]
+name = "rand"
+version = "0.9.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "9fbfd9d094a40bf3ae768db9361049ace4c0e04a4fd6b359518bd7b73a73dd97"
 dependencies = [
- "libc",
  "rand_chacha",
  "rand_core",
 ]
 
 [[package]]
 name = "rand_chacha"
-version = "0.3.1"
+version = "0.9.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "e6c10a63a0fa32252be49d21e7709d4d4baf8d231c2dbce1eaa8141b9b127d88"
+checksum = "d3022b5f1df60f26e1ffddd6c66e8aa15de382ae63b3a0c1bfc0e4d3e3f325cb"
 dependencies = [
  "ppv-lite86",
  "rand_core",
@@ -75,9 +87,9 @@ dependencies = [
 
 [[package]]
 name = "rand_core"
-version = "0.6.4"
+version = "0.9.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "ec0be4795e2f6a28069bec0b5ff3e2ac9bafc99e6a9a7dc3547996c5c816922c"
+checksum = "99d9a13982dcf210057a8a78572b2217b667c3beacbf3a0d8b454f6f82837d38"
 dependencies = [
  "getrandom",
 ]
@@ -129,9 +141,21 @@ checksum = "5a5f39404a5da50712a4c1eecf25e90dd62b613502b7e925fd4e4d19b5c96512"
 
 [[package]]
 name = "wasi"
-version = "0.11.1+wasi-snapshot-preview1"
+version = "0.14.2+wasi-0.2.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "ccf3ec651a847eb01de73ccad15eb7d99f80485de043efb2f370cd654f4ea44b"
+checksum = "9683f9a5a998d873c0d21fcbe3c083009670149a8fab228644b8bd36b2c48cb3"
+dependencies = [
+ "wit-bindgen-rt",
+]
+
+[[package]]
+name = "wit-bindgen-rt"
+version = "0.39.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "6f42320e61fe2cfd34354ecb597f86f413484a798ba44a8ca1165c58d42da6c1"
+dependencies = [
+ "bitflags",
+]
 
 [[package]]
 name = "zerocopy"
diff --git a/Cargo.toml b/Cargo.toml
index 0852c35..f7bc4df 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -12,5 +12,5 @@ categories = ["algorithms", "data-structures"]
 
 
 [dependencies]
-rand = "~0.8"
+rand = "~0.9"
 thiserror = "~2.0"
diff --git a/src/mcts.rs b/src/mcts.rs
index bce530a..17ee3cf 100644
--- a/src/mcts.rs
+++ b/src/mcts.rs
@@ -7,7 +7,7 @@ use crate::state::GameState;
 use crate::tree::arena::Arena;
 use crate::tree::node::{Node, RewardVal};
 use crate::tree::print_tree;
-use rand::prelude::SliceRandom;
+use rand::prelude::IndexedRandom;
 use std::collections::HashMap;
 use std::time::Instant;
 
@@ -75,7 +75,7 @@ impl<'conf, S: GameState + std::fmt::Debug> MCTS<'conf, S> {
         if !selected_node.state.is_terminal() {
             self.expand(selected_id);
             let children: &Vec<usize> = &self.arena.get_node(selected_id).children;
-            let random_child: usize = *children.choose(&mut rand::thread_rng()).unwrap();
+            let random_child: usize = *children.choose(&mut rand::rng()).unwrap();
             selected_id = random_child;
         }
         let rewards = self.simulate(selected_id);
diff --git a/src/policy/simulation/random.rs b/src/policy/simulation/random.rs
index a47275d..7294924 100644
--- a/src/policy/simulation/random.rs
+++ b/src/policy/simulation/random.rs
@@ -4,14 +4,14 @@
 
 use crate::state::GameState;
 use crate::tree::node::{Node, RewardVal};
-use rand::prelude::SliceRandom;
+use rand::prelude::IndexedRandom;
 use std::collections::HashMap;
 
 pub fn simulate<S: GameState>(node: &Node<S>) -> HashMap<S::Player, RewardVal> {
     let mut state: S = node.state.clone();
     while !state.is_terminal() {
         let legal_actions = state.get_legal_actions();
-        let action = legal_actions.choose(&mut rand::thread_rng()).unwrap();
+        let action = legal_actions.choose(&mut rand::rng()).unwrap();
         state = state.state_after_action(&action);
     }
     state.rewards_for_players()