diff --git a/Project.toml b/Project.toml
index 4df3bf3..ea4be65 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"
@@ -15,6 +15,7 @@ Statistics = "10745b16-79ce-11e8-11f9-7d13ad32a3b2"
 [compat]
 Ipopt = "0.6.5 - 0.7, 0.8"
 MathProgBase = "0.7"
+Statistics = "1"
 julia = "1.6"
 
 [extras]