diff --git a/Project.toml b/Project.toml
index 14a6d85..4b3112c 100644
--- a/Project.toml
+++ b/Project.toml
@@ -10,6 +10,7 @@ StaticArrays = "90137ffa-7385-5640-81b9-e52037218182"
 Statistics = "10745b16-79ce-11e8-11f9-7d13ad32a3b2"
 
 [compat]
+StaticArrays = "1"
 AbstractTrees = "0.3"
 julia = "1.6"