diff --git a/argocd/apps/openproject/values-openproject.yaml b/argocd/apps/openproject/values-openproject.yaml
index 40cfdb7..3d0aacd 100644
--- a/argocd/apps/openproject/values-openproject.yaml
+++ b/argocd/apps/openproject/values-openproject.yaml
@@ -73,7 +73,7 @@ spec:
           ## Define admin user details
           # only applicable on first installation
           # c.f. https://www.openproject.org/docs/installation-and-operations/configuration/#initial-admin-user-creation
-          admin_user:
+          admin_user: "admin"
           password: "InnoHubADMIN_2025!"
           password_reset: "false"
           name: "OpenProject Admin"