diff --git a/Project.toml b/Project.toml
index 4df3bf3..e8ba8f4 100644
--- a/Project.toml
+++ b/Project.toml
@@ -1,8 +1,8 @@
 name = "VarianceComponentModels"
 uuid = "813005db-34b4-5f71-be9e-1bbf0a1d8f1c"
 keywords = ["variance components model", "GWAS"]
-author = ["Hua Zhou <huazhou@ucla.edu>", "OpenMendel Team"]
 version = "0.1.3"
+author = ["Hua Zhou <huazhou@ucla.edu>", "OpenMendel Team"]
 
 [deps]
 Ipopt = "b6b21f68-93f8-5de0-b562-5493be1d77c9"
@@ -13,7 +13,7 @@ SparseArrays = "2f01184e-e22b-5df5-ae63-d93ebab69eaf"
 Statistics = "10745b16-79ce-11e8-11f9-7d13ad32a3b2"
 
 [compat]
-Ipopt = "0.6.5 - 0.7, 0.8"
+Ipopt = "0.6.5 - 0.7, 0.8, 1"
 MathProgBase = "0.7"
 julia = "1.6"