diff --git a/changelogs/4.0-snapshot.md b/changelogs/4.0.md
similarity index 99%
rename from changelogs/4.0-snapshot.md
rename to changelogs/4.0.md
index 01b5b5feb..2b3833f7a 100644
--- a/changelogs/4.0-snapshot.md
+++ b/changelogs/4.0.md
@@ -1,7 +1,17 @@
-# 4.0.0-SNAPSHOT-1907XX (2019-07-XX)
+# 4.0.0-BETA1
+Released 7th September 2021.
 
 This major version features substantial changes throughout the core, including significant API changes, new world format support, performance improvements and a network revamp.
 
+Please note that this is a BETA release and is not finalized. While no significant changes are expected between now and release, the API might still be changed.
+
+Please also note that this changelog is provided on a best-effort basis, and it's possible some changes might not have been mentioned here.
+If you find any omissions, please submit pull requests to add them.
+
+## WARNING
+This is NOT a stable release. PMMP accepts no responsibility or liability for any damages incurred by using this build.
+It should be used for TESTING purposes only.
+
 ## Contents
   * [Core](#core)
     + [General](#general)
diff --git a/src/VersionInfo.php b/src/VersionInfo.php
index d6bfa93cf..b61191507 100644
--- a/src/VersionInfo.php
+++ b/src/VersionInfo.php
@@ -29,10 +29,10 @@ use function str_repeat;
 
 final class VersionInfo{
 	public const NAME = "PocketMine-MP";
-	public const BASE_VERSION = "4.0.0";
-	public const IS_DEVELOPMENT_BUILD = true;
+	public const BASE_VERSION = "4.0.0-BETA1";
+	public const IS_DEVELOPMENT_BUILD = false;
 	public const BUILD_NUMBER = 0;
-	public const BUILD_CHANNEL = "";
+	public const BUILD_CHANNEL = "beta";
 
 	private function __construct(){
 		//NOOP