diff --git a/tuic-client/README.md b/tuic-client/README.md
index 1b69c74..ddb7629 100644
--- a/tuic-client/README.md
+++ b/tuic-client/README.md
@@ -87,6 +87,16 @@ tuic-client -c PATH/TO/CONFIG
         // Default: false
         "disable_native_certs": false,
 
+        // Optional. Maximum number of bytes to transmit to a peer without acknowledgment
+        // Should be set to at least the expected connection latency multiplied by the maximum desired throughput
+        // Default: 16MiB * 2
+        "send_window": 33554432,
+
+        // Optional. Maximum number of bytes the peer may transmit without acknowledgement on any one stream before becoming blocked
+        // Should be set to at least the expected connection latency multiplied by the maximum desired throughput
+        // Default: 16MiB
+        "receive_window": 16777216,
+
         // Optional. Interval between UDP packet fragment garbage collection
         // Default: 3s
         "gc_interval": "3s",
diff --git a/tuic-client/src/config.rs b/tuic-client/src/config.rs
index 98879a1..81f38d5 100644
--- a/tuic-client/src/config.rs
+++ b/tuic-client/src/config.rs
@@ -88,6 +88,12 @@ pub struct Relay {
     #[serde(default = "default::relay::disable_native_certs")]
     pub disable_native_certs: bool,
 
+    #[serde(default = "default::relay::send_window")]
+    pub send_window: u64,
+
+    #[serde(default = "default::relay::receive_window")]
+    pub receive_window: u32,
+
     #[serde(
         default = "default::relay::gc_interval",
         deserialize_with = "deserialize_duration"
@@ -190,6 +196,14 @@ mod default {
             false
         }
 
+        pub fn send_window() -> u64 {
+            2u64.pow(24) * 2
+        }
+
+        pub fn receive_window() -> u32 {
+            2u32.pow(24)
+        }
+
         pub fn gc_interval() -> Duration {
             Duration::from_secs(3)
         }
diff --git a/tuic-client/src/connection.rs b/tuic-client/src/connection.rs
index 5307cc2..de19db5 100644
--- a/tuic-client/src/connection.rs
+++ b/tuic-client/src/connection.rs
@@ -72,6 +72,8 @@ impl Endpoint {
         tp_cfg
             .max_concurrent_bidi_streams(VarInt::from(DEFAULT_CONCURRENT_STREAMS as u32))
             .max_concurrent_uni_streams(VarInt::from(DEFAULT_CONCURRENT_STREAMS as u32))
+            .send_window(cfg.send_window)
+            .stream_receive_window(VarInt::from_u32(cfg.receive_window))
             .max_idle_timeout(None);
 
         match cfg.congestion_control {
diff --git a/tuic-server/README.md b/tuic-server/README.md
index 2e25ddf..2da0a2f 100644
--- a/tuic-server/README.md
+++ b/tuic-server/README.md
@@ -54,7 +54,7 @@ tuic-server -c PATH/TO/CONFIG
     "udp_relay_ipv6": true,
 
     // Optional. Enable 0-RTT QUIC connection handshake on the server side
-        // This is not impacting much on the performance, as the protocol is fully multiplexed
+    // This is not impacting much on the performance, as the protocol is fully multiplexed
     // WARNING: Disabling this is highly recommended, as it is vulnerable to replay attacks. See https://blog.cloudflare.com/even-faster-connection-establishment-with-quic-0-rtt-resumption/#attack-of-the-clones
     // Default: false
     "zero_rtt_handshake": false,
@@ -79,6 +79,16 @@ tuic-server -c PATH/TO/CONFIG
     // Default: 1500
     "max_external_packet_size": 1500,
 
+    // Optional. Maximum number of bytes to transmit to a peer without acknowledgment
+    // Should be set to at least the expected connection latency multiplied by the maximum desired throughput
+    // Default: 16MiB * 2
+    "send_window": 33554432,
+
+    // Optional. Maximum number of bytes the peer may transmit without acknowledgement on any one stream before becoming blocked
+    // Should be set to at least the expected connection latency multiplied by the maximum desired throughput
+    // Default: 16MiB
+    "receive_window": 16777216,
+
     // Optional. Interval between UDP packet fragment garbage collection
     // Default: 3s
     "gc_interval": "3s",
diff --git a/tuic-server/src/config.rs b/tuic-server/src/config.rs
index 4ad7d13..eceee6b 100644
--- a/tuic-server/src/config.rs
+++ b/tuic-server/src/config.rs
@@ -70,6 +70,12 @@ pub struct Config {
     #[serde(default = "default::max_external_packet_size")]
     pub max_external_packet_size: usize,
 
+    #[serde(default = "default::send_window")]
+    pub send_window: u64,
+
+    #[serde(default = "default::receive_window")]
+    pub receive_window: u32,
+
     #[serde(
         default = "default::gc_interval",
         deserialize_with = "deserialize_duration"
@@ -154,6 +160,14 @@ mod default {
         1500
     }
 
+    pub fn send_window() -> u64 {
+        2u64.pow(24) * 2
+    }
+
+    pub fn receive_window() -> u32 {
+        2u32.pow(24)
+    }
+
     pub fn gc_interval() -> Duration {
         Duration::from_secs(3)
     }
diff --git a/tuic-server/src/server.rs b/tuic-server/src/server.rs
index 686a76a..486359a 100644
--- a/tuic-server/src/server.rs
+++ b/tuic-server/src/server.rs
@@ -78,6 +78,8 @@ impl Server {
         tp_cfg
             .max_concurrent_bidi_streams(VarInt::from(DEFAULT_CONCURRENT_STREAMS as u32))
             .max_concurrent_uni_streams(VarInt::from(DEFAULT_CONCURRENT_STREAMS as u32))
+            .send_window(cfg.send_window)
+            .stream_receive_window(VarInt::from_u32(cfg.receive_window))
             .max_idle_timeout(Some(
                 IdleTimeout::try_from(cfg.max_idle_time).map_err(|_| Error::InvalidMaxIdleTime)?,
             ));