diff --git a/Project.toml b/Project.toml
index 90f7190..c8df795 100644
--- a/Project.toml
+++ b/Project.toml
@@ -18,6 +18,7 @@ Primes = "27ebfcd6-29c5-5fa9-bf4b-fb8fc14df3ae"
 Statistics = "10745b16-79ce-11e8-11f9-7d13ad32a3b2"
 
 [compat]
+Interpolations = "0.14"
 julia = "1"
 
 [extras]