diff --git a/build/php b/build/php
index 8a396c63f..5016e0a3d 160000
--- a/build/php
+++ b/build/php
@@ -1 +1 @@
-Subproject commit 8a396c63fc5e79ea2849bfca100ea21a49ba2933
+Subproject commit 5016e0a3d54c714c12b331ea0474a6f500ffc0a3
diff --git a/changelogs/5.21.md b/changelogs/5.21.md
index 9b3c2f89a..54bebf5db 100644
--- a/changelogs/5.21.md
+++ b/changelogs/5.21.md
@@ -110,3 +110,19 @@ Released 12th November 2024.
 - 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.
+
+# 5.21.2
+Released 29th November 2024.
+
+## Fixes
+- Fixed blocks destroyable by water being able to be placed inside water.
+- Fixed deprecation warnings about nullable typehints on PHP 8.4.
+- Fixed `Utils::getNiceClosureName()` not working correctly on PHP 8.4.
+- Fixed incorrect break animations when breaking the block behind an instantly-breakable block like a torch.
+- Fixed candle extinguish logic.
+- Fixed various documentation issues around array key types.
+- Introduced a new PHPStan rule along with `Utils::promoteKeys()` to improve PHPStan error reporting around unspecified array key types. Previously, some errors were missed due to PHPStan's BenevolentUnionType.
+
+## DevOps
+- `pmmp/server-developers` team is now automatically requested for review on any new PR.
+- `Status: Waiting on Author` label is now automatically removed from PRs when they are updated.
diff --git a/src/VersionInfo.php b/src/VersionInfo.php
index bc1b24c62..efb38d71b 100644
--- a/src/VersionInfo.php
+++ b/src/VersionInfo.php
@@ -31,7 +31,7 @@ use function str_repeat;
 
 final class VersionInfo{
 	public const NAME = "PocketMine-MP";
-	public const BASE_VERSION = "5.21.2";
+	public const BASE_VERSION = "5.21.3";
 	public const IS_DEVELOPMENT_BUILD = true;
 	public const BUILD_CHANNEL = "stable";