[SEBA-494] Setting required core version

Change-Id: I8fc2c08af7bfabd93898fb890b1326c48e349c80
diff --git a/Dockerfile.synchronizer b/Dockerfile.synchronizer
index b52884a..2fc2cb0 100644
--- a/Dockerfile.synchronizer
+++ b/Dockerfile.synchronizer
@@ -14,7 +14,7 @@
 
 # xosproject/openstack-synchronizer
 
-FROM xosproject/xos-synchronizer-base:2.1.54
+FROM xosproject/xos-synchronizer-base:2.2.1
 
 COPY xos/synchronizer /opt/xos/synchronizers/openstack
 COPY VERSION /opt/xos/synchronizers/openstack/