diff --git a/Project.toml b/Project.toml
index 7eda2dd..2297286 100644
--- a/Project.toml
+++ b/Project.toml
@@ -25,7 +25,7 @@ QuantiscPartitionedMPSsExt = "PartitionedMPSs"
 EllipsisNotation = "1"
 FastMPOContractions = "^0.2.2"
 ITensorMPS = "0.3.1"
-ITensors = "0.7"
+ITensors = "0.7, 0.9"
 PartitionedMPSs = "0.5.2"
 QuanticsTCI = "0.7"
 SparseIR = "^0.96, 0.97, 1"