diff --git a/requirements_dev.txt b/requirements_dev.txt
index 99980b99d3ab31a0a33aebb80bc37a836fbc4d66..759253f026fd54ee84102e72ef46f91e9157a120 100644
--- a/requirements_dev.txt
+++ b/requirements_dev.txt
@@ -22,3 +22,4 @@ gym==0.14.0
 networkx
 ipycanvas
 pygraphviz
+graphviz