diff --git a/version.txt b/version.txt
index d01ebc6e..b28bdec0 100644
--- a/version.txt
+++ b/version.txt
@@ -1,2 +1,2 @@
-MASTER_VERSION=3.6.3
-AGENT_VERSION=3.6.4
+MASTER_VERSION=4.0.0-beta
+AGENT_VERSION=4.0.0-beta