diff --git a/snapshot/deploy/docker/controller/Dockerfile b/snapshot/deploy/docker/controller/Dockerfile
index 11005ab46e8..80dc3f95f24 100644
--- a/snapshot/deploy/docker/controller/Dockerfile
+++ b/snapshot/deploy/docker/controller/Dockerfile
@@ -12,7 +12,7 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-FROM alpine:3.6
+FROM alpine:3.11.5
 
 RUN apk add --no-cache \
     bash \
diff --git a/snapshot/deploy/docker/provisioner/Dockerfile b/snapshot/deploy/docker/provisioner/Dockerfile
index 25eb841f6c9..12c0baf17d2 100644
--- a/snapshot/deploy/docker/provisioner/Dockerfile
+++ b/snapshot/deploy/docker/provisioner/Dockerfile
@@ -12,7 +12,7 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-FROM alpine:3.6
+FROM alpine:3.11.5
 
 RUN apk add --no-cache \
     bash \