diff --git a/simlib/mixnet-sims/src/main.rs b/simlib/mixnet-sims/src/main.rs
index 5ecb59b..1e9eb91 100644
--- a/simlib/mixnet-sims/src/main.rs
+++ b/simlib/mixnet-sims/src/main.rs
@@ -22,9 +22,9 @@ use nomos_mix::message_blend::{
 };
 use parking_lot::Mutex;
 use rand::prelude::IteratorRandom;
-use rand::rngs::SmallRng;
 use rand::seq::SliceRandom;
 use rand::{RngCore, SeedableRng};
+use rand_chacha::ChaCha12Rng;
 use serde::de::DeserializeOwned;
 use serde::Serialize;
 // internal
@@ -73,7 +73,7 @@ impl SimulationApp {
                 .expect("Time went backwards")
                 .as_secs()
         });
-        let mut rng = SmallRng::seed_from_u64(seed);
+        let mut rng = ChaCha12Rng::seed_from_u64(seed);
         let mut node_ids: Vec<NodeId> = (0..settings.simulation_settings.node_count)
             .map(NodeId::from_index)
             .collect();
diff --git a/simlib/netrunner/Cargo.toml b/simlib/netrunner/Cargo.toml
index 6d8b2fd..cb1838e 100644
--- a/simlib/netrunner/Cargo.toml
+++ b/simlib/netrunner/Cargo.toml
@@ -28,6 +28,7 @@ serde_with = "2.3"
 serde_json = "1.0"
 thiserror = "1"
 tracing = { version = "0.1", default-features = false, features = ["log", "attributes"] }
+rand_chacha = "0.3"
 
 [target.'cfg(target_arch = "wasm32")'.dependencies]
 getrandom = { version = "0.2", features = ["js"] }
diff --git a/simlib/netrunner/src/network/mod.rs b/simlib/netrunner/src/network/mod.rs
index 925bd55..39fcb16 100644
--- a/simlib/netrunner/src/network/mod.rs
+++ b/simlib/netrunner/src/network/mod.rs
@@ -12,7 +12,8 @@ use std::{
 // crates
 use crossbeam::channel::{self, Receiver, Sender};
 use parking_lot::Mutex;
-use rand::{rngs::SmallRng, Rng, SeedableRng};
+use rand::{Rng, SeedableRng};
+use rand_chacha::ChaCha12Rng;
 use rayon::prelude::*;
 use serde::{Deserialize, Serialize};
 // internal
@@ -284,7 +285,7 @@ where
             .messages
             .par_iter()
             .filter(|(network_time, message)| {
-                let mut rng = SmallRng::seed_from_u64(self.seed);
+                let mut rng = ChaCha12Rng::seed_from_u64(self.seed);
                 self.send_or_drop_message(&mut rng, network_time, message)
             })
             .cloned()
diff --git a/simlib/netrunner/src/runner/mod.rs b/simlib/netrunner/src/runner/mod.rs
index f3c6470..016cd24 100644
--- a/simlib/netrunner/src/runner/mod.rs
+++ b/simlib/netrunner/src/runner/mod.rs
@@ -13,8 +13,8 @@ use crate::streaming::{
 };
 use crossbeam::channel::Sender;
 use parking_lot::RwLock;
-use rand::rngs::SmallRng;
 use rand::{RngCore, SeedableRng};
+use rand_chacha::ChaCha12Rng;
 use rayon::prelude::*;
 use serde::Serialize;
 
@@ -72,7 +72,7 @@ where
 {
     network: Network<M>,
     wards: Vec<Ward>,
-    rng: SmallRng,
+    rng: ChaCha12Rng,
 }
 
 impl<M> SimulationRunnerInner<M>
@@ -136,7 +136,7 @@ where
         // Store the settings to the producer so that we can collect them later
         producer.send(R::from(settings.clone()))?;
 
-        let rng = SmallRng::seed_from_u64(seed);
+        let rng = ChaCha12Rng::seed_from_u64(seed);
         let nodes = Arc::new(RwLock::new(nodes));
         let SimulationSettings {
             wards,