diff --git a/Project.toml b/Project.toml
index 31bbe4e04..2b439163a 100644
--- a/Project.toml
+++ b/Project.toml
@@ -80,6 +80,7 @@ CaesarZMQExt = "ZMQ"
 [compat]
 ApproxManifoldProducts = "0.7, 0.8"
 AprilTags = "0.8, 0.9"
+Clustering = "0.15"
 ColorVectorSpace = "0.9, 0.10"
 Colors = "0.12"
 Combinatorics = "1"