diff --git a/build.properties b/build.properties
index b8327753..c4c45f03 100644
--- a/build.properties
+++ b/build.properties
@@ -1,7 +1,7 @@
 minecraft.version=1.7.10
 forge.version=10.13.4.1566-1.7.10
 
-gt.version=5.09.26.20
+gt.version=5.09.26.21
 
 ae2.version=rv2-beta-33
 applecore.version=1.7.10-1.2.1+107.59407