diff --git a/env/qc_markdown.Dockerfile b/env/qc_markdown.Dockerfile
index f85ce63..c952d85 100644
--- a/env/qc_markdown.Dockerfile
+++ b/env/qc_markdown.Dockerfile
@@ -37,3 +37,4 @@ RUN R -e "remotes::install_github('kbroman/qtlcharts')"
 RUN R -e "install.packages('cowplot')"
 RUN R -e "install.packages('DT', dependencies = TRUE)"
 RUN R -e "install.packages('ggbeeswarm', dependencies = TRUE)"
+RUN R -e "install.packages('fst', dependencies = TRUE)"