diff --git a/DESCRIPTION b/DESCRIPTION
index 2d9adf3..d1ebf9a 100644
--- a/DESCRIPTION
+++ b/DESCRIPTION
@@ -53,6 +53,7 @@ Suggests:
     Matrix,
     rmarkdown (>= 2.23),
     testthat (>= 3.1),
+    TMB,
     vdiffr (>= 1.0.7),
     withr (>= 2.0.0)
 VignetteBuilder: