diff --git a/DESCRIPTION b/DESCRIPTION
index 52fd663..f72d448 100644
--- a/DESCRIPTION
+++ b/DESCRIPTION
@@ -34,6 +34,7 @@ Imports:
     loo (>= 2.0.0),
     MASS,
     matrixStats,
+    RcppEigen,
     rstan (>= 2.26.0),
     stats,
     utils,