diff --git a/Cargo.toml b/Cargo.toml
index d796548e..68959fab 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -115,7 +115,7 @@ actix-http = { version = "2.1.0", features = ["actors"] }
 rand = "0.7"
 env_logger = "0.8"
 serde_derive = "1.0"
-brotli2 = "0.3.2"
+brotli = "3.3.3"
 flate2 = "1.0.13"
 criterion = "0.3"
 
diff --git a/actix-http/Cargo.toml b/actix-http/Cargo.toml
index 5debd5d4..50bfa38b 100644
--- a/actix-http/Cargo.toml
+++ b/actix-http/Cargo.toml
@@ -31,7 +31,7 @@ openssl = ["actix-tls/openssl", "actix-connect/openssl"]
 rustls = ["actix-tls/rustls", "actix-connect/rustls"]
 
 # enable compressison support
-compress = ["flate2", "brotli2"]
+compress = ["flate2", "brotli"]
 
 # support for secure cookies
 secure-cookies = ["cookie/secure"]
@@ -82,7 +82,7 @@ serde_urlencoded = "0.7"
 time = { version = "0.2.7", default-features = false, features = ["std"] }
 
 # compression
-brotli2 = { version="0.3.2", optional = true }
+brotli = { version = "3.3.3", optional = true }
 flate2 = { version = "1.0.13", optional = true }
 
 [dev-dependencies]
diff --git a/actix-http/src/encoding/decoder.rs b/actix-http/src/encoding/decoder.rs
index b6043585..53cb2405 100644
--- a/actix-http/src/encoding/decoder.rs
+++ b/actix-http/src/encoding/decoder.rs
@@ -4,7 +4,7 @@ use std::pin::Pin;
 use std::task::{Context, Poll};
 
 use actix_threadpool::{run, CpuFuture};
-use brotli2::write::BrotliDecoder;
+use brotli::DecompressorWriter as BrotliDecoder;
 use bytes::Bytes;
 use flate2::write::{GzDecoder, ZlibDecoder};
 use futures_core::{ready, Stream};
@@ -31,7 +31,7 @@ where
     pub fn new(stream: S, encoding: ContentEncoding) -> Decoder<S> {
         let decoder = match encoding {
             ContentEncoding::Br => Some(ContentDecoder::Br(Box::new(
-                BrotliDecoder::new(Writer::new()),
+                BrotliDecoder::new(Writer::new(), 8 * 1024),
             ))),
             ContentEncoding::Deflate => Some(ContentDecoder::Deflate(Box::new(
                 ZlibDecoder::new(Writer::new()),
diff --git a/actix-http/src/encoding/encoder.rs b/actix-http/src/encoding/encoder.rs
index eb182128..0b75302d 100644
--- a/actix-http/src/encoding/encoder.rs
+++ b/actix-http/src/encoding/encoder.rs
@@ -5,7 +5,7 @@ use std::pin::Pin;
 use std::task::{Context, Poll};
 
 use actix_threadpool::{run, CpuFuture};
-use brotli2::write::BrotliEncoder;
+use brotli::CompressorWriter as BrotliEncoder;
 use bytes::Bytes;
 use flate2::write::{GzEncoder, ZlibEncoder};
 use futures_core::ready;
@@ -212,9 +212,12 @@ impl ContentEncoder {
                 Writer::new(),
                 flate2::Compression::fast(),
             ))),
-            ContentEncoding::Br => {
-                Some(ContentEncoder::Br(BrotliEncoder::new(Writer::new(), 3)))
-            }
+            ContentEncoding::Br => Some(ContentEncoder::Br(BrotliEncoder::new(
+                Writer::new(),
+                32 * 1024,
+                3,
+                22,
+            ))),
             _ => None,
         }
     }
@@ -230,8 +233,8 @@ impl ContentEncoder {
 
     fn finish(self) -> Result<Bytes, io::Error> {
         match self {
-            ContentEncoder::Br(encoder) => match encoder.finish() {
-                Ok(writer) => Ok(writer.buf.freeze()),
+            ContentEncoder::Br(mut encoder) => match encoder.flush() {
+                Ok(()) => Ok(encoder.into_inner().buf.freeze()),
                 Err(err) => Err(err),
             },
             ContentEncoder::Gzip(encoder) => match encoder.finish() {
diff --git a/awc/Cargo.toml b/awc/Cargo.toml
index 3c1963d6..c14e200c 100644
--- a/awc/Cargo.toml
+++ b/awc/Cargo.toml
@@ -65,7 +65,7 @@ actix-http-test = { version = "2.0.0", features = ["openssl"] }
 actix-utils = "2.0.0"
 actix-server = "1.0.0"
 actix-tls = { version = "2.0.0", features = ["openssl", "rustls"] }
-brotli2 = "0.3.2"
+brotli = "3.3.3"
 flate2 = "1.0.13"
 futures-util = { version = "0.3.5", default-features = false }
 env_logger = "0.7"
diff --git a/awc/tests/test_client.rs b/awc/tests/test_client.rs
index a9552d0d..014d6989 100644
--- a/awc/tests/test_client.rs
+++ b/awc/tests/test_client.rs
@@ -4,7 +4,7 @@ use std::sync::atomic::{AtomicUsize, Ordering};
 use std::sync::Arc;
 use std::time::Duration;
 
-use brotli2::write::BrotliEncoder;
+use brotli::CompressorWriter as BrotliEncoder;
 use bytes::Bytes;
 use flate2::read::GzDecoder;
 use flate2::write::GzEncoder;
@@ -506,9 +506,10 @@ async fn test_client_gzip_encoding_large_random() {
 async fn test_client_brotli_encoding() {
     let srv = test::start(|| {
         App::new().service(web::resource("/").route(web::to(|data: Bytes| {
-            let mut e = BrotliEncoder::new(Vec::new(), 5);
+            let mut e = BrotliEncoder::new(Vec::new(), 8096, 5, 22);
             e.write_all(&data).unwrap();
-            let data = e.finish().unwrap();
+            e.flush().unwrap();
+            let data = e.into_inner();
             HttpResponse::Ok()
                 .header("content-encoding", "br")
                 .body(data)
@@ -533,9 +534,9 @@ async fn test_client_brotli_encoding_large_random() {
 
     let srv = test::start(|| {
         App::new().service(web::resource("/").route(web::to(|data: Bytes| {
-            let mut e = BrotliEncoder::new(Vec::new(), 5);
+            let mut e = BrotliEncoder::new(Vec::new(), 8096, 5, 22);
             e.write_all(&data).unwrap();
-            let data = e.finish().unwrap();
+            let data = e.into_inner();
             HttpResponse::Ok()
                 .header("content-encoding", "br")
                 .body(data)
diff --git a/tests/test_server.rs b/tests/test_server.rs
index f8a9ab86..60b12a4b 100644
--- a/tests/test_server.rs
+++ b/tests/test_server.rs
@@ -7,7 +7,8 @@ use actix_http::http::header::{
     ContentEncoding, ACCEPT_ENCODING, CONTENT_ENCODING, CONTENT_LENGTH,
     TRANSFER_ENCODING,
 };
-use brotli2::write::{BrotliDecoder, BrotliEncoder};
+
+use brotli::{CompressorWriter as BrotliEncoder, DecompressorWriter as BrotliDecoder};
 use bytes::Bytes;
 use flate2::read::GzDecoder;
 use flate2::write::{GzEncoder, ZlibDecoder, ZlibEncoder};
@@ -340,9 +341,9 @@ async fn test_body_br_streaming() {
     println!("TEST: {:?}", bytes.len());
 
     // decode br
-    let mut e = BrotliDecoder::new(Vec::with_capacity(2048));
+    let mut e = BrotliDecoder::new(Vec::with_capacity(2048), 8096);
     e.write_all(bytes.as_ref()).unwrap();
-    let dec = e.finish().unwrap();
+    let dec = e.into_inner().unwrap();
     println!("T: {:?}", Bytes::copy_from_slice(&dec));
     assert_eq!(Bytes::from(dec), Bytes::from_static(STR.as_ref()));
 }
@@ -439,9 +440,9 @@ async fn test_body_brotli() {
     let bytes = response.body().await.unwrap();
 
     // decode brotli
-    let mut e = BrotliDecoder::new(Vec::with_capacity(2048));
+    let mut e = BrotliDecoder::new(Vec::with_capacity(2048), 8096);
     e.write_all(bytes.as_ref()).unwrap();
-    let dec = e.finish().unwrap();
+    let dec = e.into_inner().unwrap();
     assert_eq!(Bytes::from(dec), Bytes::from_static(STR.as_ref()));
 }
 
@@ -650,9 +651,10 @@ async fn test_brotli_encoding() {
         )
     });
 
-    let mut e = BrotliEncoder::new(Vec::new(), 5);
+    let mut e = BrotliEncoder::new(Vec::new(), 8096, 5, 22);
     e.write_all(STR.as_ref()).unwrap();
-    let enc = e.finish().unwrap();
+    e.flush().unwrap();
+    let enc = e.into_inner();
 
     // client request
     let request = srv
@@ -684,9 +686,10 @@ async fn test_brotli_encoding_large() {
         )
     });
 
-    let mut e = BrotliEncoder::new(Vec::new(), 5);
+    let mut e = BrotliEncoder::new(Vec::new(), 8096, 5, 22);
     e.write_all(data.as_ref()).unwrap();
-    let enc = e.finish().unwrap();
+    e.flush().unwrap();
+    let enc = e.into_inner();
 
     // client request
     let request = srv
@@ -724,9 +727,9 @@ async fn test_brotli_encoding_large_openssl() {
     });
 
     // body
-    let mut e = BrotliEncoder::new(Vec::new(), 3);
+    let mut e = BrotliEncoder::new(Vec::new(), 8096, 5, 22);
     e.write_all(data.as_ref()).unwrap();
-    let enc = e.finish().unwrap();
+    let enc = e.into_inner();
 
     // client request
     let mut response = srv