diff --git a/Project.toml b/Project.toml
index b753c53..ec67b40 100644
--- a/Project.toml
+++ b/Project.toml
@@ -23,7 +23,7 @@ FFTW = "1"
 HDF5 = "0.17"
 ITensorMPS = "0.2"
 ITensors = "0.6"
-NDTensors = "0.3"
+NDTensors = "0.3, 0.4"
 Quantics = "0.3"
 QuanticsGrids = "0.7"
 QuanticsTCI = "0.7"