diff --git a/binder/apt.txt b/binder/apt.txt
index ea5cebf71fef443cc6bf94d30eb083c22ab3faf9..9d19d52bba413508f8f4c8874100f87f68b5031b 100644
--- a/binder/apt.txt
+++ b/binder/apt.txt
@@ -1 +1,2 @@
 default-jre-headless
+graphviz