diff --git a/Project.toml b/Project.toml
index 3f131dc..374b10c 100644
--- a/Project.toml
+++ b/Project.toml
@@ -28,7 +28,7 @@ BlockSparseMatrices = "0.3"
 CompScienceMeshes = "0.11, 0.12"
 ExaFMMt = "0.1"
 ExplicitImports = "1"
-H2Trees = "0.3"
+H2Trees = "0.3, 0.4"
 JET = "0.9, 0.10, 0.11"
 JuliaFormatter = "2"
 LinearAlgebra = "1.10"