diff --git a/Project.toml b/Project.toml
index 43aa3ad..b7bd7a2 100644
--- a/Project.toml
+++ b/Project.toml
@@ -57,7 +57,7 @@ DelimitedFiles = "1"
 Distributions = "0.25"
 ExponentialUtilities = "1"
 Flux = "0.16"
-ForwardDiff = "0.10"
+ForwardDiff = "0.10, 1"
 GLMNet = "0.7"
 GR = "0.73"
 Geodesy = "1"