diff --git a/async-nats/src/jetstream/consumer/mod.rs b/async-nats/src/jetstream/consumer/mod.rs
index 13a57f170..773d28d16 100644
--- a/async-nats/src/jetstream/consumer/mod.rs
+++ b/async-nats/src/jetstream/consumer/mod.rs
@@ -1,4 +1,4 @@
-// Copyright 2020-2022 The NATS Authors
+// Copyright 2020-2023 The NATS Authors
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
 // You may obtain a copy of the License at
@@ -312,6 +312,9 @@ pub struct Config {
     /// Maximum size of a request batch
     #[serde(default, skip_serializing_if = "is_default")]
     pub max_batch: i64,
+    /// Maximum size of a request max_bytes
+    #[serde(default, skip_serializing_if = "is_default")]
+    pub max_bytes: i64,
     /// Maximum value for request expiration
     #[serde(default, with = "serde_nanos", skip_serializing_if = "is_default")]
     pub max_expires: Duration,
diff --git a/async-nats/src/jetstream/consumer/pull.rs b/async-nats/src/jetstream/consumer/pull.rs
index 11f2a090f..4ce1220e5 100644
--- a/async-nats/src/jetstream/consumer/pull.rs
+++ b/async-nats/src/jetstream/consumer/pull.rs
@@ -1,4 +1,4 @@
-// Copyright 2020-2022 The NATS Authors
+// Copyright 2020-2023 The NATS Authors
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
 // You may obtain a copy of the License at
@@ -616,6 +616,10 @@ pub struct OrderedConfig {
     // This is used explicitly by [batch] and [fetch], but also, under the hood, by [messages] and
     // [stream]
     pub max_batch: i64,
+    // Maximum number of bytes that can be requested in single Pull Request.
+    // This is used explicitly by [batch] and [fetch], but also, under the hood, by [messages] and
+    // [stream]
+    pub max_bytes: i64,
     // Maximum expiry that can be set for a single Pull Request.
     // This is used explicitly by [batch] and [fetch], but also, under the hood, by [messages] and
     // [stream]
@@ -642,6 +646,7 @@ impl From<OrderedConfig> for Config {
             max_ack_pending: 0,
             headers_only: config.headers_only,
             max_batch: config.max_batch,
+            max_bytes: config.max_bytes,
             max_expires: config.max_expires,
             inactive_threshold: Duration::from_secs(30),
             num_replicas: 1,
@@ -673,6 +678,7 @@ impl FromConsumer for OrderedConfig {
             #[cfg(feature = "server_2_10")]
             metadata: config.metadata,
             max_batch: config.max_batch,
+            max_bytes: config.max_bytes,
             max_expires: config.max_expires,
         })
     }
@@ -702,6 +708,7 @@ impl IntoConsumerConfig for OrderedConfig {
             flow_control: false,
             idle_heartbeat: Duration::default(),
             max_batch: 0,
+            max_bytes: 0,
             max_expires: Duration::default(),
             inactive_threshold: Duration::from_secs(30),
             num_replicas: 1,
@@ -1979,6 +1986,9 @@ pub struct Config {
     /// Maximum size of a request batch
     #[serde(default, skip_serializing_if = "is_default")]
     pub max_batch: i64,
+    /// Maximum value of request max_bytes
+    #[serde(default, skip_serializing_if = "is_default")]
+    pub max_bytes: i64,
     /// Maximum value for request expiration
     #[serde(default, with = "serde_nanos", skip_serializing_if = "is_default")]
     pub max_expires: Duration,
@@ -2030,6 +2040,7 @@ impl IntoConsumerConfig for Config {
             flow_control: false,
             idle_heartbeat: Duration::default(),
             max_batch: self.max_batch,
+            max_bytes: self.max_bytes,
             max_expires: self.max_expires,
             inactive_threshold: self.inactive_threshold,
             num_replicas: self.num_replicas,
@@ -2066,6 +2077,7 @@ impl FromConsumer for Config {
             max_ack_pending: config.max_ack_pending,
             headers_only: config.headers_only,
             max_batch: config.max_batch,
+            max_bytes: config.max_bytes,
             max_expires: config.max_expires,
             inactive_threshold: config.inactive_threshold,
             num_replicas: config.num_replicas,
diff --git a/async-nats/src/jetstream/consumer/push.rs b/async-nats/src/jetstream/consumer/push.rs
index c3aeb90b7..f7a7723d3 100644
--- a/async-nats/src/jetstream/consumer/push.rs
+++ b/async-nats/src/jetstream/consumer/push.rs
@@ -1,4 +1,4 @@
-// Copyright 2020-2022 The NATS Authors
+// Copyright 2020-2023 The NATS Authors
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
 // You may obtain a copy of the License at
@@ -303,6 +303,7 @@ impl IntoConsumerConfig for Config {
             flow_control: self.flow_control,
             idle_heartbeat: self.idle_heartbeat,
             max_batch: 0,
+            max_bytes: 0,
             max_expires: Duration::default(),
             inactive_threshold: Duration::default(),
             num_replicas: self.num_replicas,
@@ -420,6 +421,7 @@ impl IntoConsumerConfig for OrderedConfig {
             flow_control: true,
             idle_heartbeat: Duration::from_secs(5),
             max_batch: 0,
+            max_bytes: 0,
             max_expires: Duration::default(),
             inactive_threshold: Duration::from_secs(30),
             num_replicas: 1,