diff --git a/Project.toml b/Project.toml
index 734a972..b076d4b 100644
--- a/Project.toml
+++ b/Project.toml
@@ -13,6 +13,7 @@ Statistics = "10745b16-79ce-11e8-11f9-7d13ad32a3b2"
 
 [compat]
 Primes = "0.4, 0.5"
+Statistics = "<0.0.1, 1"
 julia = "1"
 
 [extras]