diff --git a/static/adopters.csv b/static/adopters.csv
index d00506a5a..c5caddb54 100644
--- a/static/adopters.csv
+++ b/static/adopters.csv
@@ -127,6 +127,7 @@ GDS, https://github.com/alphagov
 GEOPM, https://geopm.github.io/
 GeoVista, https://github.com/bjlittle/geovista
 GetTogether, https://github.com/GetTogetherComm/GetTogether
+ggplot2 extended, https://github.com/AnttiRask/ggplot2-extended-book
 Git for Windows, https://github.com/git-for-windows
 git, https://github.com/git/git
 GitLab, https://gitlab.com/gitlab-org/gitlab-foss/