diff --git a/docs/docs.sh b/docs/docs.sh
index 6d5ef4afc..e42383724 100755
--- a/docs/docs.sh
+++ b/docs/docs.sh
@@ -75,6 +75,7 @@ install_linux() {
            make \
            doxygen \
            pipx \
+           graphviz \
            python-is-python3 \
            python3-pip
   pipx ensurepath