diff --git a/Dockerfile.synchronizer b/Dockerfile.synchronizer
index a653a25..9925710 100644
--- a/Dockerfile.synchronizer
+++ b/Dockerfile.synchronizer
@@ -15,7 +15,7 @@
 # docker build -t xosproject/vrouter-synchronizer:candidate -f Dockerfile.synchronizer .
 
 # xosproject/vrouter-synchronizer
-FROM xosproject/xos-synchronizer-base:2.1.50
+FROM xosproject/xos-synchronizer-base:2.2.1
 
 COPY xos/synchronizer /opt/xos/synchronizers/vrouter
 COPY VERSION /opt/xos/synchronizers/vrouter/
diff --git a/xos/synchronizer/config.yaml b/xos/synchronizer/config.yaml
index df56433..ad6e7e2 100644
--- a/xos/synchronizer/config.yaml
+++ b/xos/synchronizer/config.yaml
@@ -15,6 +15,7 @@
 
 
 name: vrouter
+core_version: ">=2.2.1"
 required_models:
   - VRouterService
   - VRouterServiceInstance