diff --git a/DESCRIPTION b/DESCRIPTION
index fa8b685..1432140 100644
--- a/DESCRIPTION
+++ b/DESCRIPTION
@@ -9,6 +9,7 @@ Depends: R (>= 3.6.0),dplyr,igraph,ggplot2
 License: GPL-3
 Encoding: UTF-8
 LazyData: TRUE
+biocViews: Software, Visualization
 Imports:
     future,
     future.apply,
diff --git a/R/utilities.R b/R/utilities.R
index fdc4a59..a2043f0 100644
--- a/R/utilities.R
+++ b/R/utilities.R
@@ -396,7 +396,6 @@ identifyOverExpressedGenes <- function(object, data.use = NULL, group.by = NULL,
 
   if (do.DE) {
     # select genes based on differential expression
-    data.use <- as.matrix(data.use)
 
     if (is.null(group.by)) {
       labels <- object@idents
@@ -495,7 +494,7 @@ identifyOverExpressedGenes <- function(object, data.use = NULL, group.by = NULL,
       object@var.features[[features.name]] <- markers.all
 
     } else {
-
+      data.use <- as.matrix(data.use)
       my.sapply <- ifelse(
         test = future::nbrOfWorkers() == 1,
         yes = pbapply::pbsapply,