diff --git a/CHANGELOG.md b/CHANGELOG.md
index bb8a38e..a3f2e29 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -8,10 +8,15 @@ All notable changes to this project will be documented in this file.
 
 - Support configuring compression for OTEL ([#70]).
 - Improve tracing details by adding a `tower_http::trace::TraceLayer` that creates spans for every HTTP request ([#71]).
+
+### Changed
+
 - Improve tracing for running queries on Trino, adding spans for the request to Trino and parsing ([#71]).
+- Improve performance by using [`serde_json::value::RawValue`](https://docs.rs/serde_json/latest/serde_json/value/struct.RawValue.html) for the `data` and `columns` attributes to avoid unneeded deserialization and serialization of them ([#73]).
 
 [#70]: https://github.com/stackabletech/trino-lb/pull/70
 [#71]: https://github.com/stackabletech/trino-lb/pull/71
+[#73]: https://github.com/stackabletech/trino-lb/pull/73
 
 ## [0.4.1] - 2025-03-03
 
diff --git a/trino-lb-core/src/trino_api.rs b/trino-lb-core/src/trino_api.rs
index 60e3ce9..5867151 100644
--- a/trino-lb-core/src/trino_api.rs
+++ b/trino-lb-core/src/trino_api.rs
@@ -5,6 +5,7 @@ use std::{
 
 use prusto::{QueryError, Warning};
 use serde::{Deserialize, Serialize};
+use serde_json::value::RawValue;
 use snafu::{ResultExt, Snafu};
 use tracing::instrument;
 use url::Url;
@@ -42,8 +43,8 @@ pub struct TrinoQueryApiResponse {
     pub info_uri: String,
     pub partial_cancel_uri: Option<String>,
 
-    pub columns: Option<serde_json::Value>,
-    pub data: Option<serde_json::Value>,
+    pub columns: Option<Box<RawValue>>,
+    pub data: Option<Box<RawValue>>,
 
     pub error: Option<QueryError>,
     pub warnings: Vec<Warning>,