diff --git a/ntex-bytes/CHANGELOG.md b/ntex-bytes/CHANGELOG.md
index fbe058dd..717d1843 100644
--- a/ntex-bytes/CHANGELOG.md
+++ b/ntex-bytes/CHANGELOG.md
@@ -1,5 +1,9 @@
 # Changes
 
+## [0.1.21] (2023-11-1)
+
+* Data race in BytesMut #243
+
 ## [0.1.19] (2023-01-23)
 
 * Add PollRef::resize_read_buf() and PollRef::resize_write_buf() helpers
diff --git a/ntex-bytes/Cargo.toml b/ntex-bytes/Cargo.toml
index c57e0861..24bf6909 100644
--- a/ntex-bytes/Cargo.toml
+++ b/ntex-bytes/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "ntex-bytes"
-version = "0.1.20"
+version = "0.1.21"
 license = "MIT"
 authors = ["Nikolay Kim <fafhrd91@gmail.com>", "Carl Lerche <me@carllerche.com>"]
 description = "Types and traits for working with bytes (bytes crate fork)"
diff --git a/ntex-bytes/src/bytes.rs b/ntex-bytes/src/bytes.rs
index 602a74a8..7088e373 100644
--- a/ntex-bytes/src/bytes.rs
+++ b/ntex-bytes/src/bytes.rs
@@ -1814,9 +1814,7 @@ impl fmt::Write for BytesMut {
 impl Clone for BytesMut {
     #[inline]
     fn clone(&self) -> BytesMut {
-        BytesMut {
-            inner: unsafe { self.inner.shallow_clone() },
-        }
+        BytesMut::from(&self[..])
     }
 }
 
diff --git a/ntex/Cargo.toml b/ntex/Cargo.toml
index 5552ba50..21945300 100644
--- a/ntex/Cargo.toml
+++ b/ntex/Cargo.toml
@@ -55,7 +55,7 @@ ntex-router = "0.5.2"
 ntex-service = "1.2.7"
 ntex-macros = "0.1.3"
 ntex-util = "0.3.4"
-ntex-bytes = "0.1.20"
+ntex-bytes = "0.1.21"
 ntex-h2 = "0.4.4"
 ntex-rt = "0.4.10"
 ntex-io = "0.3.6"