diff --git a/project/build.properties b/project/build.properties
index 6a4e93e00..c05d56c01 100644
--- a/project/build.properties
+++ b/project/build.properties
@@ -2,6 +2,6 @@
 #Mon Jul 27 09:16:46 EDT 2009
 project.organization=sbt
 project.name=Simple Build Tool Parent
-sbt.version=0.5.2
+sbt.version=0.5.1
 project.version=0.5.2
 scala.version=2.7.4