diff --git a/vignettes/getting-started.Rmd b/vignettes/getting-started.Rmd
index 360b4497..5f420135 100644
--- a/vignettes/getting-started.Rmd
+++ b/vignettes/getting-started.Rmd
@@ -19,6 +19,11 @@ knitr::opts_chunk$set(
   collapse = TRUE,
   comment = "#>"
 )
+
+# already load SeuratObject and SingleCellExperiment
+# so warnings generated by these packages are not shown
+library(SeuratObject)
+library(SingleCellExperiment)
 ```
 
 # Introduction