diff --git a/Dockerfile.synchronizer b/Dockerfile.synchronizer
index be1eb0c..248223c 100644
--- a/Dockerfile.synchronizer
+++ b/Dockerfile.synchronizer
@@ -16,7 +16,7 @@
 
 # xosproject/vtn-synchronizer
 
-FROM xosproject/xos-synchronizer-base:candidate
+FROM xosproject/xos-synchronizer-base:2.0.0
 
 COPY xos/synchronizer /opt/xos/synchronizers/vtn
 COPY VERSION /opt/xos/synchronizers/vtn/
diff --git a/VERSION b/VERSION
index 519af9a..3eefcb9 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-6.0.0.dev
+1.0.0