diff --git a/Project.toml b/Project.toml
index cba2a3c..6e8da8b 100644
--- a/Project.toml
+++ b/Project.toml
@@ -20,7 +20,7 @@ StatsModels = "3eaba693-59b7-5ba5-a881-562e759f1c8d"
 [compat]
 Distributions = "0.16 - 0.25"
 GLM = "1"
-Ipopt = "0.6.5 - 0.7, 0.8, 0.9"
+Ipopt = "0.6.5 - 0.7, 0.8, 0.9, 1"
 MathOptInterface = "0.10, 1"
 NLopt = "0.6"
 RDatasets = "0.7"