diff --git a/DESCRIPTION b/DESCRIPTION
index 1c97a1ae..74c089da 100644
--- a/DESCRIPTION
+++ b/DESCRIPTION
@@ -35,7 +35,8 @@ Imports:
     GenomicRanges,
     methods,
     S4Vectors,
-    crayon
+    crayon,
+    Matrix
 Suggests:
     BiocStyle,
     testthat,