diff --git a/Cargo.toml b/Cargo.toml
index bfa6921..76f5ab8 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -16,3 +16,4 @@ itertools = "0.11.0"
 camino = "1.1.6"
 id_tree = "1.8.0"
 color-eyre = "0.6.2"
+petgraph = "0.6.4"