diff --git a/argo/istio-ingress/templates/istio-ingress.yaml b/argo/istio-ingress/templates/istio-ingress.yaml
index b63babd..f22734e 100644
--- a/argo/istio-ingress/templates/istio-ingress.yaml
+++ b/argo/istio-ingress/templates/istio-ingress.yaml
@@ -72,5 +72,9 @@ spec:
         port:
           number: {{ .Values.istio.port }}
         host: {{ .Values.istio.backendHost }}
+      headers:
+        response:
+          set:
+            Strict-Transport-Security: max-age=31536000; includeSubDomains
 ...
 {{ end }}