diff --git a/Dockerfile.synchronizer b/Dockerfile.synchronizer
index 346a379..d70b0a4 100644
--- a/Dockerfile.synchronizer
+++ b/Dockerfile.synchronizer
@@ -14,7 +14,7 @@
 
 # xosproject/exampleservice-synchronizer
 
-FROM xosproject/xos-synchronizer-base:2.1.54
+FROM xosproject/xos-synchronizer-base:2.2.1
 
 COPY xos/synchronizer /opt/xos/synchronizers/exampleservice
 COPY VERSION /opt/xos/synchronizers/exampleservice/
diff --git a/VERSION b/VERSION
index f963933..b7aaf72 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-2.2.6-dev
+2.2.7-dev
diff --git a/xos/synchronizer/config.yaml b/xos/synchronizer/config.yaml
index edce5e0..46c5fa6 100644
--- a/xos/synchronizer/config.yaml
+++ b/xos/synchronizer/config.yaml
@@ -15,6 +15,7 @@
 
 
 name: exampleservice
+core_version: ">=2.2.1"
 required_models:
   - ExampleService
   - ExampleServiceInstance