diff --git a/build.properties b/build.properties
index 4c10404dc..1cdd5fba6 100644
--- a/build.properties
+++ b/build.properties
@@ -1,4 +1,4 @@
-version=4.0ea
+version=4.0b1
 
 antlr3.jar=/usr/local/lib/antlr-3.4-complete.jar
 build.sysclasspath=ignore