diff --git a/Project.toml b/Project.toml
index 7f20396..24f3520 100644
--- a/Project.toml
+++ b/Project.toml
@@ -34,6 +34,6 @@ PrettyTables = "2.2"
 SimpleTraits = "0.9"
 SimpleValueGraphs = "0.4"
 SimpleWeightedGraphs = "1.2"
-TensorOperations = "3.2"
+TensorOperations = "3.2, 4"
 WhereTraits = "1"
 julia = "1.8"