diff --git a/Project.toml b/Project.toml
index 28878cb..02939c6 100644
--- a/Project.toml
+++ b/Project.toml
@@ -8,6 +8,7 @@ RegionTrees = "dee08c22-ab7f-5625-9660-a9af2021b33f"
 StaticArrays = "90137ffa-7385-5640-81b9-e52037218182"
 
 [compat]
+FileIO = "1.3"
 RegionTrees = "≥ 0.2.0"
 julia = "≥ 1"