diff --git a/Project.toml b/Project.toml
index 6f60dd2..d082ca3 100644
--- a/Project.toml
+++ b/Project.toml
@@ -8,4 +8,5 @@ Distributions = "31c24e10-a181-5473-b8eb-7969acd0382f"
 Optim = "429524aa-4258-5aef-a3af-852621145aeb"
 
 [compat]
+Optim = "1"
 julia = "1"