diff --git a/xos/synchronizer/Dockerfile.synchronizer b/xos/synchronizer/Dockerfile.synchronizer
index 2ff1099..0af09ea 100644
--- a/xos/synchronizer/Dockerfile.synchronizer
+++ b/xos/synchronizer/Dockerfile.synchronizer
@@ -13,6 +13,7 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
+# This Dockerfile is DEPRECATED and will be removed imminently.
 
 # xosproject/vtr-synchronizer
 FROM xosproject/xos-synchronizer-base:candidate