diff --git a/CHANGELOG.md b/CHANGELOG.md
index 7e0e0e6b..ad295ebd 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -4,7 +4,10 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
-## Unreleased
+## [2.4.3] 2022-02-24
+
+### Security
+- Fixed incorrect MDC parsing for session key decryption
 
 ### Changed
 - `SeparateKeyAndData` is now implemented in a more generic way, by checking for the location in the bytes of the last session key packet, then splitting the binary message after that point.
@@ -13,7 +16,6 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - `SeparateKeyAndData` now correctly parses AEAD packets.
 - `(ap *AttachmentProcessor) Finish()` now returns encryption errors correctly.
 
-
 ## [2.4.2] 2022-01-13
 
 ### Changed
diff --git a/constants/armor.go b/constants/armor.go
index 3ffa1758..9ae380e9 100644
--- a/constants/armor.go
+++ b/constants/armor.go
@@ -3,7 +3,7 @@ package constants
 
 // Constants for armored data.
 const (
-	ArmorHeaderVersion = "GopenPGP 2.4.2"
+	ArmorHeaderVersion = "GopenPGP 2.4.3"
 	ArmorHeaderComment = "https://gopenpgp.org"
 	PGPMessageHeader   = "PGP MESSAGE"
 	PGPSignatureHeader = "PGP SIGNATURE"
diff --git a/constants/version.go b/constants/version.go
index 2a420d07..c900e290 100644
--- a/constants/version.go
+++ b/constants/version.go
@@ -1,3 +1,3 @@
 package constants
 
-const Version = "2.4.2"
+const Version = "2.4.3"