diff --git a/Project.toml b/Project.toml
index 29f5952..795de74 100644
--- a/Project.toml
+++ b/Project.toml
@@ -17,6 +17,7 @@ StatsModels = "3eaba693-59b7-5ba5-a881-562e759f1c8d"
 Compat = "^3.0"
 DataFrames = "0.19, 0.20, 0.21"
 DataStructures = "0.18"
+Distributions = "0.20, 0.21, 0.22, 0.23, 0.24"
 Formatting = "^0.3.3, 0.4"
 GLM = "^1.0"
 Parameters = "0.12"