diff --git a/DESCRIPTION b/DESCRIPTION
index b1ba150..c45ecb9 100644
--- a/DESCRIPTION
+++ b/DESCRIPTION
@@ -1,11 +1,11 @@
 Package: sciClone
 Title: Detect subclones from genomic sequence data
-Version: 1.1.0
+Version: 1.1.1
 Author: Chris Miller, Brian White, Nathan Dees
 Description: Identifies clonal entities from sequenced populations of cells, using read count information.
 Maintainer: Chris Miller <cmiller@genome.wustl.edu>
 LazyLoad: yes
 License: Apache License 2.0 | file LICENSE
 Depends: IRanges, bmm, rgl, RColorBrewer, ggplot2, grid, plotrix,
-        methods, NORMT3, MKmisc, TeachingDemos
-Packaged: 2016-03-20 11:07:15 PM; cmiller
+        methods, NORMT3, MKmisc, TeachingDemos, dplyr
+Packaged: 2023-10-11 05:03:14 PM; cmiller
diff --git a/R/sciClone.R b/R/sciClone.R
index 1c12804..06f18c2 100644
--- a/R/sciClone.R
+++ b/R/sciClone.R
@@ -9,6 +9,8 @@ sciClone <- function(vafs, copyNumberCalls=NULL, regionsToExclude=NULL,
                      copyNumberMargins=0.25, maximumClusters=10, annotation=NULL,
                      doClusteringAlongMargins=TRUE, plotIntermediateResults=0){
 
+  suppressPackageStartupMessages(library(dplyr))
+
   if(verbose){print("checking input data...")}
 
   #how many samples do we have?
@@ -227,8 +229,9 @@ sciClone <- function(vafs, copyNumberCalls=NULL, regionsToExclude=NULL,
       vafs.1d.merged.cn2 = cbind(vafs.merged.cn2.orig,cluster=marginalClust[[i]]$cluster.assignments)
       vafs.1d.merged = merge(vafs.merged.orig,vafs.1d.merged.cn2, by.x=c(1:length(vafs.merged.orig)),
         by.y=c(1:length(vafs.merged.orig)),all.x=TRUE)
+
       ##sort by chr, st
-      vafs.1d.merged = vafs.1d.merged[order(vafs.1d.merged[,1,drop=FALSE], vafs.1d.merged[,2,drop=FALSE]),]
+      vafs.1d.merged = dplyr::arrange(vafs.1d.merged, chr, st)
       vafs.1d[[i]] = vafs.1d.merged
     }
   }