diff --git a/Project.toml b/Project.toml
index a4249d1..30d743c 100644
--- a/Project.toml
+++ b/Project.toml
@@ -8,6 +8,7 @@ DataStructures = "864edb3b-99cc-5e75-8d2d-829cb0a9cfe8"
 Plots = "91a5bcdd-55d7-5caf-9e0b-520d859cae80"
 
 [compat]
+DataStructures = "0.18"
 julia = "1"
 
 [extras]