diff --git a/Project.toml b/Project.toml
index cecf487..d27a8c2 100644
--- a/Project.toml
+++ b/Project.toml
@@ -31,6 +31,7 @@ BenchmarkTools = "1"
 ChainRulesCore = "1"
 Combinatorics = "1"
 ForwardDiff = "0.10"
+HyperDualNumbers = "4.0.10"
 LoopVectorization = "0.12"
 LuxCore = "0.1.3"
 NamedTupleTools = "0.14.3"