diff --git a/Project.toml b/Project.toml
index 2e7fa7665..2dd2901e6 100644
--- a/Project.toml
+++ b/Project.toml
@@ -40,7 +40,9 @@ ScikitLearn = "0.6, 0.7"
 StableRNGs = "1"
 Statistics = "1"
 StatsBase = "0.33, 0.34"
-julia = "1.6, 1.7, 1.8"
+Printf = "1"
+Random = "1"
+julia = "1.6, 1.7, 1.8, 1.9"
 
 [extras]
 Plots = "91a5bcdd-55d7-5caf-9e0b-520d859cae80"