diff --git a/substrate/utils/frame/remote-externalities/src/lib.rs b/substrate/utils/frame/remote-externalities/src/lib.rs
index 9eee2071ce289..9f530106f2a44 100644
--- a/substrate/utils/frame/remote-externalities/src/lib.rs
+++ b/substrate/utils/frame/remote-externalities/src/lib.rs
@@ -24,7 +24,10 @@ mod logging;
 
 use codec::{Compact, Decode, Encode};
 use indicatif::{ProgressBar, ProgressStyle};
-use jsonrpsee::{core::params::ArrayParams, http_client::HttpClient};
+use jsonrpsee::{
+	core::params::ArrayParams,
+	ws_client::{WsClient, WsClientBuilder},
+};
 use log::*;
 use serde::de::DeserializeOwned;
 use sp_core::{
@@ -158,34 +161,35 @@ pub struct OfflineConfig {
 pub enum Transport {
 	/// Use the `URI` to open a new WebSocket connection.
 	Uri(String),
-	/// Use HTTP connection.
-	RemoteClient(HttpClient),
+	/// Use WS connection.
+	RemoteClient(Arc<WsClient>),
 }
 
 impl Transport {
-	fn as_client(&self) -> Option<&HttpClient> {
+	fn as_client(&self) -> Option<&WsClient> {
 		match self {
 			Self::RemoteClient(client) => Some(client),
 			_ => None,
 		}
 	}
 
-	// Build an HttpClient from a URI.
+	// Build an [`Self::RemoteClient`] from a URI.
 	async fn init(&mut self) -> Result<()> {
 		if let Self::Uri(uri) = self {
 			debug!(target: LOG_TARGET, "initializing remote client to {uri:?}");
 
-			let http_client = HttpClient::builder()
+			let ws_client = WsClientBuilder::default()
 				.max_request_size(u32::MAX)
 				.max_response_size(u32::MAX)
 				.request_timeout(std::time::Duration::from_secs(60 * 5))
 				.build(uri)
+				.await
 				.map_err(|e| {
 					error!(target: LOG_TARGET, "error: {e:?}");
 					"failed to build http client"
 				})?;
 
-			*self = Self::RemoteClient(http_client)
+			*self = Self::RemoteClient(Arc::new(ws_client))
 		}
 
 		Ok(())
@@ -198,9 +202,9 @@ impl From<String> for Transport {
 	}
 }
 
-impl From<HttpClient> for Transport {
-	fn from(client: HttpClient) -> Self {
-		Transport::RemoteClient(client)
+impl From<WsClient> for Transport {
+	fn from(client: WsClient) -> Self {
+		Transport::RemoteClient(Arc::new(client))
 	}
 }
 
@@ -228,11 +232,11 @@ pub struct OnlineConfig<H> {
 }
 
 impl<H: Clone> OnlineConfig<H> {
-	/// Return rpc (http) client reference.
-	fn rpc_client(&self) -> &HttpClient {
+	/// Return rpc (ws) client reference.
+	fn rpc_client(&self) -> &WsClient {
 		self.transport
 			.as_client()
-			.expect("http client must have been initialized by now; qed.")
+			.expect("ws client must have been initialized by now; qed.")
 	}
 
 	fn at_expected(&self) -> H {
@@ -338,7 +342,7 @@ where
 	B::Hash: DeserializeOwned,
 	B::Header: DeserializeOwned,
 {
-	const PARALLEL_REQUESTS: usize = 4;
+	const PARALLEL_REQUESTS: usize = 8;
 	const BATCH_SIZE_INCREASE_FACTOR: f32 = 1.10;
 	const BATCH_SIZE_DECREASE_FACTOR: f32 = 0.50;
 	const REQUEST_DURATION_TARGET: Duration = Duration::from_secs(15);
@@ -433,7 +437,8 @@ where
 		let builder = Arc::new(self.clone());
 		let mut handles = vec![];
 
-		for (start_key, end_key) in start_keys.into_iter().zip(end_keys) {
+		for (worker_index, (start_key, end_key)) in start_keys.into_iter().zip(end_keys).enumerate()
+		{
 			let permit = parallel
 				.clone()
 				.acquire_owned()
@@ -447,7 +452,13 @@ where
 
 			let handle = tokio::spawn(async move {
 				let res = builder
-					.rpc_get_keys_in_range(&prefix, block, start_key.as_ref(), end_key.as_ref())
+					.rpc_get_keys_in_range(
+						&prefix,
+						block,
+						start_key.as_ref(),
+						end_key.as_ref(),
+						worker_index,
+					)
 					.await;
 				drop(permit);
 				res
@@ -479,6 +490,7 @@ where
 		block: B::Hash,
 		start_key: Option<&StorageKey>,
 		end_key: Option<&StorageKey>,
+		worker_index: usize,
 	) -> Result<Vec<StorageKey>> {
 		let mut last_key: Option<&StorageKey> = start_key;
 		let mut keys: Vec<StorageKey> = vec![];
@@ -512,7 +524,7 @@ where
 
 			debug!(
 				target: LOG_TARGET,
-				"new total = {}, full page received: {}",
+				"new total = {}, full page received: {}, worker = {worker_index}",
 				keys.len(),
 				HexDisplay::from(last_key.expect("full page received, cannot be None"))
 			);
@@ -566,7 +578,7 @@ where
 	/// }
 	/// ```
 	async fn get_storage_data_dynamic_batch_size(
-		client: &HttpClient,
+		client: &WsClient,
 		payloads: Vec<(String, ArrayParams)>,
 		bar: &ProgressBar,
 	) -> Result<Vec<Option<StorageData>>, String> {
@@ -767,7 +779,7 @@ where
 
 	/// Get the values corresponding to `child_keys` at the given `prefixed_top_key`.
 	pub(crate) async fn rpc_child_get_storage_paged(
-		client: &HttpClient,
+		client: &WsClient,
 		prefixed_top_key: &StorageKey,
 		child_keys: Vec<StorageKey>,
 		at: B::Hash,
@@ -814,7 +826,7 @@ where
 	}
 
 	pub(crate) async fn rpc_child_get_keys(
-		client: &HttpClient,
+		client: &WsClient,
 		prefixed_top_key: &StorageKey,
 		child_prefix: StorageKey,
 		at: B::Hash,
@@ -1589,12 +1601,12 @@ mod remote_tests {
 		let at = builder.as_online().at.unwrap();
 
 		let prefix = StorageKey(vec![13]);
-		let paged = builder.rpc_get_keys_in_range(&prefix, at, None, None).await.unwrap();
+		let paged = builder.rpc_get_keys_in_range(&prefix, at, None, None, 0).await.unwrap();
 		let para = builder.rpc_get_keys_parallel(&prefix, at, 4).await.unwrap();
 		assert_eq!(paged, para);
 
 		let prefix = StorageKey(vec![]);
-		let paged = builder.rpc_get_keys_in_range(&prefix, at, None, None).await.unwrap();
+		let paged = builder.rpc_get_keys_in_range(&prefix, at, None, None, 0).await.unwrap();
 		let para = builder.rpc_get_keys_parallel(&prefix, at, 8).await.unwrap();
 		assert_eq!(paged, para);
 	}