diff --git a/Project.toml b/Project.toml
index d73b9b9..e9a361a 100644
--- a/Project.toml
+++ b/Project.toml
@@ -21,7 +21,7 @@ EllipsisNotation = "1"
 FastMPOContractions = "0.2.2"
 HubbardAtoms = "0.1.0"
 ITensorMPS = "0.3.2"
-ITensors = "0.7"
+ITensors = "0.7, 0.9"
 JET = "0.9.12"
 OrderedCollections = "1"
 Quantics = "0.4"