diff --git a/Project.toml b/Project.toml
index 5667296..4856294 100644
--- a/Project.toml
+++ b/Project.toml
@@ -17,6 +17,7 @@ Printf = "de0858da-6303-5e67-8744-51eddeeeb8d7"
 Statistics = "10745b16-79ce-11e8-11f9-7d13ad32a3b2"
 
 [compat]
+GeometricalPredicates = "0.4"
 julia = "1.3"
 
 [extras]