diff --git a/Project.toml b/Project.toml
index a827e44..294fbc0 100644
--- a/Project.toml
+++ b/Project.toml
@@ -26,7 +26,7 @@ DiffResults = "1"
 DocStringExtensions = "0.8,0.9"
 ExtendableGrids = "1.9.2"
 ExtendableSparse = "1.5.1"
-ForwardDiff = "0.10.35"
+ForwardDiff = "0.10.35, 1"
 LinearAlgebra = "1.9"
 Polynomials = "2.0.21, 3, 4"
 Printf = "1.9"