diff --git a/README.md b/README.md
index b09bd33c3..d40d2495e 100644
--- a/README.md
+++ b/README.md
@@ -5,7 +5,7 @@
 ### :warning: WARNING :warning::  You **CANNOT** publish any code generated by this tool.
 
 ### Supported versions:
-1.13->1.21.8
+1.13->1.21.9
 
 ### Important
 1.17< Needs JDK 16
diff --git a/build.gradle b/build.gradle
index 82617ce89..d48cee217 100644
--- a/build.gradle
+++ b/build.gradle
@@ -34,10 +34,10 @@ group = 'me.yourname'
 version = '1.0.0'
 
 ext {
-    minecraft_version = '1.21.8'
-    mcp_version = '20250717.105350'
+    minecraft_version = '1.21.9'
+    mcp_version = '20250930.103108'
     mappings_channel = 'official'
-    mappings_version = '1.21.8'
+    mappings_version = '1.21.9'
     spi_version = '7.0.0'
 }