diff --git a/Project.toml b/Project.toml
index d23f2af..7f1917f 100644
--- a/Project.toml
+++ b/Project.toml
@@ -24,6 +24,7 @@ CFMMExaFMMt = ["ExaFMMt", "BEAST"]
 [compat]
 BlockSparseMatrices = "0.3.0"
 CompScienceMeshes = "0.12"
+H2Trees = "0.3"
 MKL = "0.6.3"
 OhMyThreads = "0.8.4"
 SparseArrays = "1.12.0"