diff --git a/Project.toml b/Project.toml
index 1843889..f6f166b 100644
--- a/Project.toml
+++ b/Project.toml
@@ -17,7 +17,7 @@ Test = "8dfed614-e22c-5e08-85e1-65c5234f0b40"
 ColorSchemes = "^3.5"
 ColorTypes = "^0.10"
 Colors = "^0.12"
-DataStructures = "^0.17"
+DataStructures = "^0.18"
 ReplMaker = "^0.2"
 StatsBase = "^0.33"
 StructC14N = "^0.3"