diff --git a/docker/app.Dockerfile b/docker/app.Dockerfile
index 307c14c51..fba65eee7 100644
--- a/docker/app.Dockerfile
+++ b/docker/app.Dockerfile
@@ -30,6 +30,7 @@ RUN apt-get install -qy \
 	fish \
 	gawk \
 	gcc \
+	ghostscript \
 	git \
 	gnupg \
 	graphviz \