diff --git a/Project.toml b/Project.toml
index 6b3e3f701..d8aa30965 100644
--- a/Project.toml
+++ b/Project.toml
@@ -43,6 +43,7 @@ Neighborhood = "0.2.2"
 Reexport = "0.2, 1"
 Requires = "^1"
 SimpleDiffEq = "^1"
+StateSpaceSets = "0.1"
 StaticArrays = "^1"
 StatsBase = "^0.33"
 TimeseriesSurrogates = "^2"