diff --git a/ardac1dmo/demo.ardac.org/values.yaml b/ardac1dmo/demo.ardac.org/values.yaml
index b718381..cc022dd 100644
--- a/ardac1dmo/demo.ardac.org/values.yaml
+++ b/ardac1dmo/demo.ardac.org/values.yaml
@@ -60,6 +60,7 @@ aws-es-proxy:
   enabled: true
   image:
     repository: "quay.io/cdis/aws-es-proxy"
+    # quay.io/cdis/aws-es-proxy does not publish immutable release tags; "master" is the only available tag
     tag: "master"
   esEndpoint: "vpc-ardac1dmo-gen3-metadata-r5fevwf45ert54xbwhb3omlvsm.us-east-1.es.amazonaws.com"
   externalSecrets:
diff --git a/ardac1prd/portal.ardac.org/values.yaml b/ardac1prd/portal.ardac.org/values.yaml
index d448552..9e40c02 100644
--- a/ardac1prd/portal.ardac.org/values.yaml
+++ b/ardac1prd/portal.ardac.org/values.yaml
@@ -61,6 +61,7 @@ aws-es-proxy:
   enabled: true
   image:
     repository: quay.io/cdis/aws-es-proxy
+    # quay.io/cdis/aws-es-proxy does not publish immutable release tags; "master" is the only available tag
     tag: "master"
   esEndpoint: "vpc-ardac1prd-gen3-metadata-34ztrt3iey3wvgd36nrpf5gk5m.us-east-1.es.amazonaws.com"
   externalSecrets: