diff --git a/changelogs/5.20.md b/changelogs/5.20.md
index 8d7e971d93..b0da701d67 100644
--- a/changelogs/5.20.md
+++ b/changelogs/5.20.md
@@ -17,3 +17,9 @@ Consider using the `mcpe-protocol` directive in `plugin.yml` as a constraint if
 
 ## Fixes
 - Fixed a bug in `tools/generate-blockstate-upgrade-schema.php` that caused it to fail on 1.21.40 with the new mushroom block changes.
+
+# 5.20.1
+Released 31st October 2024.
+
+## Fixes
+- Workaround old mob heads in world saves not being upgraded correctly and causing crashes.
diff --git a/src/VersionInfo.php b/src/VersionInfo.php
index 11c5b1c88d..20d0154c70 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 = "5.20.1";
-	public const IS_DEVELOPMENT_BUILD = true;
+	public const IS_DEVELOPMENT_BUILD = false;
 	public const BUILD_CHANNEL = "stable";
 
 	/**