diff --git a/requirements_dev.txt b/requirements_dev.txt
index 5fad00e401dc657dd2e60f886e8e6ebac022d2bd..99980b99d3ab31a0a33aebb80bc37a836fbc4d66 100644
--- a/requirements_dev.txt
+++ b/requirements_dev.txt
@@ -21,3 +21,4 @@ attrs
 gym==0.14.0
 networkx
 ipycanvas
+pygraphviz