diff --git a/Project.toml b/Project.toml
index 97e863fd..50ef8553 100644
--- a/Project.toml
+++ b/Project.toml
@@ -43,7 +43,7 @@ HypothesisTests = "v0.11"
 InteractiveUtils = "1"
 LambertW = "1.0.0"
 LinearAlgebra = "1"
-LogExpFunctions = "0.3"
+LogExpFunctions = "0.3, 1"
 MvNormalCDF = "0.2, 0.3"
 Optim = "2"
 Plots = "1"