diff --git a/Project.toml b/Project.toml
index f1a8988..b372185 100644
--- a/Project.toml
+++ b/Project.toml
@@ -18,7 +18,7 @@ DensityInterface = "0.4.0"
 Distributions = "0.25.122"
 LinearAlgebra = "1.12.0"
 LogExpFunctions = "0.3.29"
-Optim = "1.13.3"
+Optim = "1.13.3, 2"
 Random = "1.11.0"
 SpecialFunctions = "2.6.1"
 StatsAPI = "1.8.0"