diff --git a/workflow/scripts/downstream_viz.r b/workflow/scripts/downstream_viz.r
index 1838f01c894f29cbda252ece76b9ec76ee7472c0..49bfe70484382106522ecf115e7fcbf5424417d5 100644
--- a/workflow/scripts/downstream_viz.r
+++ b/workflow/scripts/downstream_viz.r
@@ -1,4 +1,4 @@
-if (!require(optparse)) install.packages('optparse')
+if (!require(optparse)) install.packages('optparse',repos='http://cran.us.r-project.org',quiet=TRUE)
 library(optparse)
 library(Seurat)