diff --git a/.ci/requirements.txt b/.ci/requirements.txt
index de7d3a90aebbfb30c043492b7a6013e7b4a7685f..29d214c6d353a39b1c4bc27bda170e1009f366ee 100644
--- a/.ci/requirements.txt
+++ b/.ci/requirements.txt
@@ -4,10 +4,12 @@ r-base
 bioconductor-biocstyle
 r-htmltools
 r-flexdashboard
+r-ggplot2
 r-glue
 r-leaflet
 r-knitr
 r-magrittr
+r-plotly
 r-stringi
 r-stringr
 r-yaml