diff --git a/changelogs/5.24.md b/changelogs/5.24.md
new file mode 100644
index 0000000000..a159d0e768
--- /dev/null
+++ b/changelogs/5.24.md
@@ -0,0 +1,108 @@
+# 5.24.0
+Released 22nd January 2025.
+
+This is a minor feature release, including new gameplay features, performance improvements, and minor API additions.
+
+**Plugin compatibility:** Plugins for previous 5.x versions will run unchanged on this release, unless they use internal APIs, reflection, or packages like the `pocketmine\network\mcpe` or `pocketmine\data` namespace.
+Do not update plugin minimum API versions unless you need new features added in this release.
+
+**WARNING: If your plugin uses the `pocketmine\network\mcpe` namespace, you're not shielded by API change constraints.**
+Consider using the `mcpe-protocol` directive in `plugin.yml` as a constraint if you're using packets directly.
+
+## Performance
+- PHP garbage collection is now managed by the server, instead of being automatically triggered by PHP.
+  - The mechanism for GC triggering is designed to mimic PHP's to avoid behavioural changes. Only the place it's triggered from should be significantly different.
+  - This change also avoids unnecessary GCs during object-heavy operations, such as encoding `CraftingDataPacket`. As such, performance during server join should see an improvement.
+  - Timings is now able to directly measure the impact of GC. Previously, GC would show up as random spikes under random timers, skewing timing results.
+- `ChunkCache` now uses `string` for completed caches directly instead of keeping them wrapped in `CompressBatchPromise`s. This reduces memory usage, improves performance, and reduces GC workload.
+
+## Configuration
+- The following settings have been removed from `pocketmine.yml` and will no longer have any effect:
+  - `memory.garbage-collection.collect-async-worker` (now always `true`)
+  - `memory.garbage-collection.low-memory-trigger` (now always `true`)
+  - `memory.max-chunks.trigger-chunk-collect` (now always `true`)
+  - `memory.world-caches.disable-chunk-cache` (now always `true`)
+  - `memory.world-caches.low-memory-trigger` (now always `true`)
+
+## Gameplay
+- Added the following new blocks:
+  - All types of pale oak wood, and leaves
+  - Resin
+  - Resin Bricks, Slabs, Stairs, and Walls
+  - Resin Clump
+  - Chiseled Resin Bricks
+- Some blocks have had their tool tier requirements adjusted to match latest Bedrock updates.
+- Added the following new items:
+  - Resin Brick
+  - Music Disc - Creator
+  - Music Disc - Creator (Music Box)
+  - Music Disc - Precipice
+  - Music Disc - Relic
+
+## API
+### General
+- Many places had their PHPDoc improved to address issues highlighted by PHPStan 2.x. This may cause new, previously unreported issues to be reported in plugins using PHPStan.
+
+### `pocketmine`
+- The following methods have been deprecated:
+  - `MemoryManager->canUseChunkCache()`
+  - `MemoryManager::dumpMemory()` - relocated to `MemoryDump` class
+
+### `pocketmine\item`
+- The following new enum cases have been added:
+  - `RecordType::DISK_CREATOR`
+  - `RecordType::DISK_CREATOR_MUSIC_BOX`
+  - `RecordType::DISK_PRECIPICE`
+  - `RecordType::DISK_RELIC`
+
+### `pocketmine\player`
+- The following new methods have been added:
+  - `public Player->getFlightSpeedMultiplier() : float` - a base multiplier for player's flight speed
+  - `public Player->setFlightSpeedMultiplier(float $flightSpeedMultiplier) : void` - sets the player's flight speed multiplier
+- The following new constants have been added:
+  - `Player::DEFAULT_FLIGHT_SPEED_MULTIPLIER`
+
+### `pocketmine\utils`
+- The following new methods have been added:
+  - `public static TextFormat::javaToBedrock(string $string) : string` - removes unsupported Java Edition format codes to prevent them being incorrectly displayed on Bedrock
+- The following methods have behavioural changes:
+  - `TextFormat::toHTML()` now converts `§m` to redstone red (instead of strikethrough), and `§n` to copper orange (instead of underline). This is because the codes previously used for `STRIKETHROUGH` and `UNDERLINE` conflict with the new material codes introduced by Minecraft Bedrock.
+  - `Terminal::toANSI()` now converts `§m` to redstone red (instead of strikethrough), and `§n` to copper orange (instead of underline), as above. However, underline and strikethrough can still be used on the terminal using `Terminal::$FORMAT_UNDERLINE` and `Terminal::$FORMAT_STRIKETHROUGH` respectively.
+- The following new constants have been added:
+  - `TextFormat::MATERIAL_QUARTZ`
+  - `TextFormat::MATERIAL_IRON`
+  - `TextFormat::MATERIAL_NETHERITE`
+  - `TextFormat::MATERIAL_REDSTONE`
+  - `TextFormat::MATERIAL_COPPER`
+  - `TextFormat::MATERIAL_GOLD`
+  - `TextFormat::MATERIAL_EMERALD`
+  - `TextFormat::MATERIAL_DIAMOND`
+  - `TextFormat::MATERIAL_LAPIS`
+  - `TextFormat::MATERIAL_AMETHYST`
+- The following constants have been deprecated:
+  - `TextFormat::STRIKETHROUGH`
+  - `TextFormat::UNDERLINE`
+- The following static properties have been added:
+  - `Terminal::$COLOR_MATERIAL_QUARTZ`
+  - `Terminal::$COLOR_MATERIAL_IRON`
+  - `Terminal::$COLOR_MATERIAL_NETHERITE`
+  - `Terminal::$COLOR_MATERIAL_REDSTONE`
+  - `Terminal::$COLOR_MATERIAL_COPPER`
+  - `Terminal::$COLOR_MATERIAL_GOLD`
+  - `Terminal::$COLOR_MATERIAL_EMERALD`
+  - `Terminal::$COLOR_MATERIAL_DIAMOND`
+  - `Terminal::$COLOR_MATERIAL_LAPIS`
+  - `Terminal::$COLOR_MATERIAL_AMETHYST`
+
+## Tools
+- Fixed some UI issues in `tools/convert-world.php`
+
+## Internals
+- Block cache in `World` is now size-limited. This prevents memory exhaustion when plugins call `getBlock()` many thousands of times with cache misses.
+- `RakLibServer` now disables PHP GC. As RakLib doesn't generate any unmanaged cycles, GC is just a waste of CPU time in this context.
+- `MemoryManager` now has the responsibility for triggering cycle GC. It's checked every tick, but GC won't take place unless the GC threshold is exceeded, similar to PHP.
+  - This mechanism could probably do with alterations to better suit PocketMine-MP, but it was chosen to mimic PHP's own GC to minimize behavioural changes for now.
+- `AsyncTask` now triggers cycle GC after `onRun()` completes. As with `MemoryManager`, this is based on a threshold designed to mimic PHP's own behaviour.
+- `FormatConverter` now performs world provider GC periodically. This is not needed with current active providers, but was found to be a problem while developing custom providers.
+- Various internal adjustments were made to avoid returning incorrectly-keyed arrays in the code. These changes shouldn't affect anything as the arrays should have been properly ordered anyway.
+- Many places that previously used `==` and `!=` have been updated to use strict variants. This kind of change needs to be done carefully to avoid breaking `int|float` comparisons.
diff --git a/src/VersionInfo.php b/src/VersionInfo.php
index 10a3168350..aaa357e0f9 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 = "5.23.4";
+	public const BASE_VERSION = "5.24.1";
 	public const IS_DEVELOPMENT_BUILD = true;
 	public const BUILD_CHANNEL = "stable";
 
diff --git a/src/network/upnp/UPnP.php b/src/network/upnp/UPnP.php
index 2d48a2db83..bd8e8376f3 100644
--- a/src/network/upnp/UPnP.php
+++ b/src/network/upnp/UPnP.php
@@ -215,6 +215,7 @@ class UPnP{
 			'SOAPAction: "urn:schemas-upnp-org:service:WANIPConnection:1#AddPortMapping"'
 		];
 
+		$err = "";
 		if(Internet::postURL($serviceURL, $contents, 3, $headers, $err) === null){
 			throw new UPnPException("Failed to portforward using UPnP: " . $err);
 		}
diff --git a/src/utils/Internet.php b/src/utils/Internet.php
index 1811ce51e9..89af2a77ef 100644
--- a/src/utils/Internet.php
+++ b/src/utils/Internet.php
@@ -157,21 +157,22 @@ class Internet{
 	 * POSTs data to an URL
 	 * NOTE: This is a blocking operation and can take a significant amount of time. It is inadvisable to use this method on the main thread.
 	 *
+	 * @phpstan-template TErrorVar of mixed
+	 *
 	 * @param string[]|string $args
 	 * @param string[]        $extraHeaders
 	 * @param string|null     $err          reference parameter, will be set to the output of curl_error(). Use this to retrieve errors that occurred during the operation.
 	 * @phpstan-param string|array<string, string> $args
 	 * @phpstan-param list<string>                 $extraHeaders
-	 * @phpstan-param-out string|null              $err
+	 * @phpstan-param TErrorVar                    $err
+	 * @phpstan-param-out TErrorVar|string         $err
 	 */
 	public static function postURL(string $page, array|string $args, int $timeout = 10, array $extraHeaders = [], &$err = null) : ?InternetRequestResult{
 		try{
-			$result = self::simpleCurl($page, $timeout, $extraHeaders, [
+			return self::simpleCurl($page, $timeout, $extraHeaders, [
 				CURLOPT_POST => 1,
 				CURLOPT_POSTFIELDS => $args
 			]);
-			$err = null;
-			return $result;
 		}catch(InternetException $ex){
 			$err = $ex->getMessage();
 			return null;