diff --git a/Project.toml b/Project.toml
index 4cdff16..48c7521 100644
--- a/Project.toml
+++ b/Project.toml
@@ -68,7 +68,7 @@ LinearAlgebra = "1"
 MAT = "0.10"
 MLJLinearModels = "0.10"
 NearestNeighbors = "0.4"
-Optim = "1"
+Optim = "1, 2"
 Parameters = "0.12"
 Pkg = "1"
 Plots = "1"