diff --git a/CHANGELOG.md b/CHANGELOG.md
index 95514786..1a5704ca 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,7 @@
+## lock_api 0.4.3 (2021-04-03)
+
+- Added `[Raw]ReentrantMutex::is_owned`. (#280)
+
 ## parking_lot_core 0.8.3 (2021-02-12)
 
 - Updated smallvec to 1.6. (#276)
diff --git a/lock_api/Cargo.toml b/lock_api/Cargo.toml
index 9e884a4d..4b9d242a 100644
--- a/lock_api/Cargo.toml
+++ b/lock_api/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "lock_api"
-version = "0.4.2"
+version = "0.4.3"
 authors = ["Amanieu d'Antras <amanieu@gmail.com>"]
 description = "Wrappers to create fully-featured Mutex and RwLock types. Compatible with no_std."
 license = "Apache-2.0/MIT"