diff --git a/Project.toml b/Project.toml
index b4a927a..1aac286 100644
--- a/Project.toml
+++ b/Project.toml
@@ -27,7 +27,7 @@ MPSKit = "0.10, 0.11"
 OptimKit = "0.3"
 Revise = "3"
 TensorKit = "0.12"
-TensorOperations = "4"
+TensorOperations = "4, 5"
 Zygote = "0.6"
 julia = "1.6.7"