diff --git a/Dockerfile b/Dockerfile
index 1213994a77388ce108ae099b83477dcd9b2db808..f79a0c2bf1b5c8b9e15a35cf7d2e6a9e318c8711 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,6 +1,6 @@
-ARG BASE_REGISTRY=registry1.dsop.io
+ARG BASE_REGISTRY=registry1.dsop.mil
 ARG BASE_IMAGE=ironbank/redhat/ubi/ubi8
-ARG BASE_TAG=8.3
+ARG BASE_TAG=8.4
 ARG CONTAINER_NAME=ambassador
 ARG CONTAINER_VERSION=0.37.1-rc5
 FROM datawire/ambassador:0.37.1-rc5 as source
diff --git a/hardening_manifest.yaml b/hardening_manifest.yaml
index 266281dd24127f3c6fb135d553922d5946cd4d8d..910d1c23d65ac3666c6125c41cc7ef331d88d06e 100644
--- a/hardening_manifest.yaml
+++ b/hardening_manifest.yaml
@@ -11,7 +11,7 @@ tags:
 # Build args passed to Dockerfile ARGs
 args:
   BASE_IMAGE: "redhat/ubi/ubi8"
-  BASE_TAG: "8.3"
+  BASE_TAG: "8.4"
 
 # Docker image labels
 labels: