diff --git a/xos/synchronizer/Dockerfile.synchronizer b/xos/synchronizer/Dockerfile.synchronizer
index fafbbb3..39087e7 100644
--- a/xos/synchronizer/Dockerfile.synchronizer
+++ b/xos/synchronizer/Dockerfile.synchronizer
@@ -13,6 +13,8 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
+# This Dockerfile is DEPRECATED and will be removed imminently.
+
 # docker build -t xosproject/volt-synchronizer:candidate -f Dockerfile.synchronizer .
 
 # xosproject/volt-synchronizer