diff --git a/install/templates/oas-single-sign-on-variables.yaml b/install/templates/oas-single-sign-on-variables.yaml
index a5e52e6a50c66b101351dc34a4043526f455e1cb..1287a92a8eb33265f50298fc5f4e0426b866deea 100644
--- a/install/templates/oas-single-sign-on-variables.yaml
+++ b/install/templates/oas-single-sign-on-variables.yaml
@@ -4,7 +4,7 @@ kind: Secret
 metadata:
   name: oas-single-sign-on-variables
 data:
-  userbackend_admin_username: {{ "admin" | b64encode }}
+  userbackend_admin_username: "{{ "admin" | b64encode }}"
   userbackend_admin_password: "{{ 32 | generate_password | b64encode }}"
   userbackend_postgres_password: "{{ 32 | generate_password | b64encode }}"
   hydra_system_secret: "{{ 32 | generate_password | b64encode }}"