diff --git a/Project.toml b/Project.toml
index 78fe4136c25..4f27145c800 100644
--- a/Project.toml
+++ b/Project.toml
@@ -75,7 +75,7 @@ Downloads = "1.6"
 ECOS = "1.1.2"
 EllipsisNotation = "1.0"
 FillArrays = "1.9"
-ForwardDiff = "0.10.36"
+ForwardDiff = "0.10.36, 1"
 HDF5 = "0.16.10, 0.17"
 LinearAlgebra = "1"
 LinearMaps = "2.7, 3.0"