diff --git a/changelogs/4.9.md b/changelogs/4.9.md
index 34b861657..6bbd5af8e 100644
--- a/changelogs/4.9.md
+++ b/changelogs/4.9.md
@@ -12,3 +12,25 @@ Released 20th September 2022.
 ## General
 - Added support for Minecraft: Bedrock Edition 1.19.30.
 - Removed support for older versions.
+
+# 4.9.1
+Released 11th October 2022.
+
+## Documentation
+- Added and improved documentation for many API methods in `Player` and `Block`.
+- Added missing `@internal` tag for `TaskHandler->setNextRun()`, `TaskHandler->remove()` and `TaskHandler->run()`.
+
+## Fixes
+- Flight state is now locked by the server in spectator mode. This prevents any attempt by the client to toggle flight mode.
+- Fixed entity health exceeding its max health after the expiry of Health Boost effect.
+- Fixed burp sound not being played when a player eats food.
+- Fixed placement conditions for mushrooms - they can now only be placed when the light level at the target is <= 12, or on podzol or mycelium.
+- Fixed sign text appearing to change colour and/or glow when using dye on a sign - since this feature is not yet implemented, no change should occur.
+- Fixed players drowning when sprint-swimming on the surface of water.
+
+## Internals
+- Added more detailed debug logging during the player login sequence.
+- Silenced debug spam during `PreSpawnPacketHandler`, considerably reducing debug noise when players join.
+- Fixed an edge case in `InventoryManager->removeWindow()`. This bug didn't have any effect on stable versions, but caused a `next-minor` development version to crash.
+- `Item`s returned by event getters are now cloned if modifying the result will have no useful side effects.
+- Updated `pocketmine/bedrock-data` to [`1.11.1`](https://github.com/pmmp/BedrockData/tree/1.11.1%2Bbedrock-1.19.30), which reduces bandwidth consumption during logins by not sending useless biome generation data.
diff --git a/src/VersionInfo.php b/src/VersionInfo.php
index bfbcdb7fd..e2302f773 100644
--- a/src/VersionInfo.php
+++ b/src/VersionInfo.php
@@ -32,7 +32,7 @@ use function str_repeat;
 final class VersionInfo{
 	public const NAME = "PocketMine-MP";
 	public const BASE_VERSION = "4.9.1";
-	public const IS_DEVELOPMENT_BUILD = true;
+	public const IS_DEVELOPMENT_BUILD = false;
 	public const BUILD_CHANNEL = "stable";
 
 	private function __construct(){