diff --git a/charts/flux-bootstrap/templates/known-hosts.yaml b/charts/flux-bootstrap/templates/known-hosts.yaml
index dc40b39..072c0d6 100644
--- a/charts/flux-bootstrap/templates/known-hosts.yaml
+++ b/charts/flux-bootstrap/templates/known-hosts.yaml
@@ -3,5 +3,5 @@
 metadata:
   name: known-hosts
   namespace: {{ .Release.Namespace }}
-data:
-  known_hosts: {{ printf "%s %s" .Values.repositoryHost .Values.repositoryHostPublicKey | toYaml | indent 2 }}
+binaryData:
+  known_hosts: {{ .Values.repositoryHostPublicKeys | b64enc }}