diff --git a/changelogs/5.21.md b/changelogs/5.21.md
index b8131a3c8b9..9b3c2f89adf 100644
--- a/changelogs/5.21.md
+++ b/changelogs/5.21.md
@@ -101,3 +101,12 @@ Consider using the `mcpe-protocol` directive in `plugin.yml` as a constraint if
 ## Internals
 - Fixed incorrect visibility of `createEntity` in spawn eggs.
 - Added support for newer `BedrockBlockUpgradeSchema` in `BlockStateUpgrader`.
+
+# 5.21.1
+Released 12th November 2024.
+
+## Fixes
+- Fixed server crash when applying a cooldown to an item with 1 count.
+- Fixed garbage collector cycle count increase on player disconnect.
+- Fixed weakness effect being applied to all attack types, causing damage splash potions to become weaker.
+- Fixed Enchanted Golden Apple regeneration effect amplifier to match vanilla.
diff --git a/src/VersionInfo.php b/src/VersionInfo.php
index 8fe6d32dd4f..4691fb213ca 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 = "5.21.1";
-	public const IS_DEVELOPMENT_BUILD = true;
+	public const IS_DEVELOPMENT_BUILD = false;
 	public const BUILD_CHANNEL = "stable";
 
 	/**