diff --git a/r.scripts/sc_Demultiplex.R b/r.scripts/sc_Demultiplex.R
index c2a74b28fd54c834403af5eecd9266f57727c80f..8db3ce42008afc087cb481856b754811daafd9b6 100755
--- a/r.scripts/sc_Demultiplex.R
+++ b/r.scripts/sc_Demultiplex.R
@@ -8,7 +8,7 @@ library(readr)
 #retrive command line options
 option_list=list(
   make_option("--p",action="store",default="Pr",type='character',help="Project Name"),
-  make_option("--d",action="store",default=4,type='integer',help="Demultiplex Group Number"),
+  make_option("--d",action="store",default=1,type='integer',help="Demultiplex Group Number"),
   make_option("--mc",action="store",default=3,type='integer',help="Minimum Cells"),
   make_option("--mg",action="store",default=200,type='integer',help="Minimum Genes")
 )