diff --git a/Project.toml b/Project.toml
index 3f766b9f..31de57ef 100644
--- a/Project.toml
+++ b/Project.toml
@@ -31,6 +31,7 @@ HDF5 = "0.17"
 Interpolations = "0.14, 0.15"
 LightXML = "0.9"
 Makie = "0.21"
+NaturalNeighbours = "1.3"
 PyPlot = "2.9"
 RecipesBase = "1.1"
 Reexport = "1.2"