diff --git a/docs/Project.toml b/docs/Project.toml
index 58448d2..1373e1f 100644
--- a/docs/Project.toml
+++ b/docs/Project.toml
@@ -19,5 +19,6 @@ ADTypes = "1.21.0"
 ComponentArrays = "0.15.31"
 Documenter = "1.3"
 ForwardDiff = "1.3.1"
+ImplicitDifferentiation = "0.9.1"
 Literate = "2.21.0"
 NLsolve = "4.5.1"