diff --git a/changelogs/4.2.md b/changelogs/4.2.md
index 96f84914870..840b944989c 100644
--- a/changelogs/4.2.md
+++ b/changelogs/4.2.md
@@ -107,3 +107,9 @@ Released 17th April 2022.
 - Fixed a memory leak in RakLib which could result in a server crash when players stay online for a long time.
 - Fixed server crash when attempting to load a corrupted empty resource pack.
 - Fixed users with the same name with differerently cased letters being able to duplicate items (userdata is matched by case-insensitive name).
+
+# 4.2.9
+Released 19th April 2022.
+
+## Fixes
+- Fixed several potential crashes when deserializing item NBT (due to insufficient validation of input data).
diff --git a/src/VersionInfo.php b/src/VersionInfo.php
index 36b0c4893f5..6228b9c6359 100644
--- a/src/VersionInfo.php
+++ b/src/VersionInfo.php
@@ -32,7 +32,7 @@
 final class VersionInfo{
 	public const NAME = "PocketMine-MP";
 	public const BASE_VERSION = "4.2.9";
-	public const IS_DEVELOPMENT_BUILD = true;
+	public const IS_DEVELOPMENT_BUILD = false;
 	public const BUILD_CHANNEL = "stable";
 
 	private function __construct(){