diff --git a/DESCRIPTION b/DESCRIPTION
index 51b18b6..2201c93 100644
--- a/DESCRIPTION
+++ b/DESCRIPTION
@@ -36,7 +36,7 @@ Suggests:
     knitr (>= 1.42),
     Matrix,
     RcppEigen,
-    rmarkdown (>= 2.23),
+    rmarkdown (>= 2.28),
     rstan,
     testthat (>= 3.0.4),
     tidyr (>= 0.8.3),