diff --git a/Project.toml b/Project.toml
index e13d907..3155033 100644
--- a/Project.toml
+++ b/Project.toml
@@ -17,7 +17,7 @@ Accessors = "0.1.26"
 Compat = "4.8"
 Folds = "0.2.8"
 ITensorMPS = "0.3"
-ITensors = "0.7, 0.8"
+ITensors = "0.7, 0.8, 0.9"
 MPI = "0.20"
 julia = "1.10"