diff --git a/Project.toml b/Project.toml
index b753c53..b542b56 100644
--- a/Project.toml
+++ b/Project.toml
@@ -21,7 +21,7 @@ TensorCrossInterpolation = "b261b2ec-6378-4871-b32e-9173bb050604"
 Arpack = "0.5"
 FFTW = "1"
 HDF5 = "0.17"
-ITensorMPS = "0.2"
+ITensorMPS = "0.2, 0.4"
 ITensors = "0.6"
 NDTensors = "0.3"
 Quantics = "0.3"