diff --git a/configure.in b/configure.in
index 5b07e1efcc..b47d725e35 100644
--- a/configure.in
+++ b/configure.in
@@ -3,10 +3,10 @@
 
 # Must change all of the below together
 # For a release, set revision for that tagged release as well and uncomment
-AC_INIT([freeswitch], [1.5.0], bugs@freeswitch.org)
+AC_INIT([freeswitch], [1.5.1b], bugs@freeswitch.org)
 AC_SUBST(SWITCH_VERSION_MAJOR, [1])
 AC_SUBST(SWITCH_VERSION_MINOR, [5])
-AC_SUBST(SWITCH_VERSION_MICRO, [0])
+AC_SUBST(SWITCH_VERSION_MICRO, [1b])
 AC_SUBST(SWITCH_VERSION_REVISION, [])
 AC_SUBST(SWITCH_VERSION_REVISION_HUMAN, [])