diff --git a/multi-repo/argo-app-of-apps/dev/templates/ecsdemo-crystal.yaml b/multi-repo/argo-app-of-apps/dev/templates/ecsdemo-crystal.yaml
index 054a4ab5f..ea0191d69 100644
--- a/multi-repo/argo-app-of-apps/dev/templates/ecsdemo-crystal.yaml
+++ b/multi-repo/argo-app-of-apps/dev/templates/ecsdemo-crystal.yaml
@@ -13,6 +13,10 @@ spec:
       server: {{ .Values.destinationServer | default .Values.spec.destination.server }}
   sourceRepos:
     - {{ .Values.spec.apps.ecsdemoCrystal.repoURL }}
+  {{- with .Values.sourceNamespaces }}
+  sourceNamespaces:
+    {{- toYaml .| nindent 4 }}
+  {{- end }}
 ---
 {{- end }}
 apiVersion: argoproj.io/v1alpha1
diff --git a/multi-repo/argo-app-of-apps/dev/templates/ecsdemo-frontend.yaml b/multi-repo/argo-app-of-apps/dev/templates/ecsdemo-frontend.yaml
index f37357eea..773dd85b3 100644
--- a/multi-repo/argo-app-of-apps/dev/templates/ecsdemo-frontend.yaml
+++ b/multi-repo/argo-app-of-apps/dev/templates/ecsdemo-frontend.yaml
@@ -13,8 +13,12 @@ spec:
       server: {{ .Values.destinationServer | default .Values.spec.destination.server }}
   sourceRepos:
     - {{ .Values.spec.apps.ecsdemoFrontend.repoURL }}
-{{- end }}
+  {{- with .Values.sourceNamespaces }}
+  sourceNamespaces:
+    {{- toYaml .| nindent 4 }}
+  {{- end }}
 ---
+{{- end }}
 apiVersion: argoproj.io/v1alpha1
 kind: Application
 metadata:
diff --git a/multi-repo/argo-app-of-apps/dev/templates/ecsdemo-nodejs.yaml b/multi-repo/argo-app-of-apps/dev/templates/ecsdemo-nodejs.yaml
index a718814e3..1c67b624c 100644
--- a/multi-repo/argo-app-of-apps/dev/templates/ecsdemo-nodejs.yaml
+++ b/multi-repo/argo-app-of-apps/dev/templates/ecsdemo-nodejs.yaml
@@ -13,6 +13,10 @@ spec:
       server: {{ .Values.destinationServer | default .Values.spec.destination.server }}
   sourceRepos:
     - {{ .Values.spec.apps.ecsdemoNodejs.repoURL }}
+  {{- with .Values.sourceNamespaces }}
+  sourceNamespaces:
+    {{- toYaml .| nindent 4 }}
+  {{- end }}
 ---
 {{- end }}
 apiVersion: argoproj.io/v1alpha1