diff --git a/install/templates/oas-single-sign-on-variables.yaml b/install/templates/oas-single-sign-on-variables.yaml
index 1287a92a8eb33265f50298fc5f4e0426b866deea..7424dd4ed4eb672b4030ff632b560f2b19852e80 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 }}"