diff --git a/Project.toml b/Project.toml
index 2fe9b84a..e0021361 100644
--- a/Project.toml
+++ b/Project.toml
@@ -41,7 +41,7 @@ DiffEqUncertainty = "1"
 DifferentialEquations = "7"
 Distributions = "0.25"
 Flux = "0.13, 0.14, 0.15, 0.16"
-ForwardDiff = "0.10"
+ForwardDiff = "0.10, 1"
 Franklin = "0.10"
 IntervalArithmetic = "0.22"
 KernelDensity = "0.6"