diff --git a/DESCRIPTION b/DESCRIPTION
index 5b533a49..4de23291 100644
--- a/DESCRIPTION
+++ b/DESCRIPTION
@@ -59,6 +59,7 @@ Suggests:
     vdiffr,
     prodlim,
     loo
+Additional_repositories: https://stan-dev.r-universe.dev
 Config/testthat/edition: 3
 Config/testthat/parallel: true
 Collate: