diff --git a/nodes/mockpool-node/src/tx.rs b/nodes/mockpool-node/src/tx.rs
index 664c5106..887776d0 100644
--- a/nodes/mockpool-node/src/tx.rs
+++ b/nodes/mockpool-node/src/tx.rs
@@ -1,4 +1,4 @@
-use blake2::{Blake2b512, Digest};
+use blake2::{Blake2s256, Digest};
 use serde::{Deserialize, Serialize};
 use std::hash::Hash;
 
@@ -10,10 +10,28 @@ pub struct TxId([u8; 32]);
 
 impl From<&Tx> for TxId {
     fn from(tx: &Tx) -> Self {
-        let mut hasher = Blake2b512::new();
+        let mut hasher = Blake2s256::new();
         hasher.update(bincode::serde::encode_to_vec(tx, bincode::config::standard()).unwrap());
         let mut id = [0u8; 32];
         id.copy_from_slice(hasher.finalize().as_slice());
         Self(id)
     }
 }
+
+#[cfg(test)]
+mod test {
+    use super::*;
+
+    #[test]
+    fn test_txid() {
+        let tx = Tx("test".to_string());
+        let txid = TxId::from(&tx);
+        assert_eq!(
+            txid.0,
+            [
+                26, 113, 217, 35, 178, 18, 65, 215, 30, 117, 195, 9, 189, 146, 124, 78, 66, 91, 97,
+                21, 254, 51, 156, 155, 144, 52, 135, 125, 51, 128, 186, 244
+            ]
+        );
+    }
+}
diff --git a/nomos-services/http/src/http.rs b/nomos-services/http/src/http.rs
index 1a44364c..f2619350 100644
--- a/nomos-services/http/src/http.rs
+++ b/nomos-services/http/src/http.rs
@@ -5,9 +5,8 @@ use std::{
     fmt::{self, Debug},
     sync::Arc,
 };
-
-use bytes::Bytes;
 // crates
+use bytes::Bytes;
 use overwatch_rs::services::{
     handle::ServiceStateHandle,
     relay::{InboundRelay, OutboundRelay, RelayMessage},