diff --git a/DESCRIPTION b/DESCRIPTION
index b354c4472..a09de858c 100644
--- a/DESCRIPTION
+++ b/DESCRIPTION
@@ -51,7 +51,8 @@ Suggests:
     readr,
     glmmTMB,
     ggdist,
-    distributional
+    distributional,
+    hexbin
 Description: Graceful 'ggplot'-based graphics and utility functions for working with generalized additive models (GAMs) fitted using the 'mgcv' package. Provides a reimplementation of the plot() method for GAMs that 'mgcv' provides, as well as 'tidyverse' compatible representations of estimated smooths.
 License: MIT + file LICENSE
 LazyData: true