diff --git a/spec/README.md b/spec/README.md
index d1d5df6..2d6a8d4 100644
--- a/spec/README.md
+++ b/spec/README.md
@@ -13,3 +13,5 @@ To test in Cloud Build, the docker image needs both npm and java installed. [doc
 ```
 gcloud builds submit --config cloudbuild.yaml .
 ```
+
+- [ ] TODO Container Registry will be phased out, starting May 15, 2024. Please review the options below for how to upgrade your projects to Artifact Registry.
diff --git a/spec/docker/cloudbuild.yaml b/spec/docker/cloudbuild.yaml
index dac4c5a..7aac6a2 100644
--- a/spec/docker/cloudbuild.yaml
+++ b/spec/docker/cloudbuild.yaml
@@ -2,4 +2,4 @@ steps:
   - name: "gcr.io/cloud-builders/docker"
     args: ["build", "-t", "gcr.io/$PROJECT_ID/npm-with-java8", "."]
 images:
-  - "gcr.io/$PROJECT_ID/npm-with-java8"
+  - "gcr.io/$PROJECT_ID/npm-with-java8" # TODO Container Registry will be phased out, starting May 15, 2024. Please review the options below for how to upgrade your projects to Artifact Registry.