diff --git a/build.properties b/build.properties
index e530cb932..97a637986 100644
--- a/build.properties
+++ b/build.properties
@@ -1,4 +1,4 @@
 minecraft_version=1.9
 forge_version=12.16.0.1842-1.9
-mod_version=4.0.0
-mappings_version=snapshot_nodoc_20160324
\ No newline at end of file
+mod_version=4.0.1
+mappings_version=snapshot_nodoc_20160324