diff --git a/Project.toml b/Project.toml
index e75fb30..ffba279 100644
--- a/Project.toml
+++ b/Project.toml
@@ -4,6 +4,7 @@ authors = ["Charles Dufour", "Jake Grainger"]
 version = "0.5.0"
 
 [deps]
+ArnoldiMethod = "ec485272-7323-5ecc-a04f-4719b315124d"
 Arpack = "7d9fca2a-8960-54d3-9f78-7d1dccf2cb97"
 BenchmarkTools = "6e4b80f9-dd63-53aa-95a3-0cdb28fa8baf"
 CodecZstd = "6b39b394-51ab-5f42-8807-6242bab2b4c2"