diff --git a/Project.toml b/Project.toml
index bad9d18..93ffb93 100644
--- a/Project.toml
+++ b/Project.toml
@@ -25,7 +25,7 @@ TCIT4AITensorCompatConversion = ["ITensors", "T4AITensorCompat"]
 BitIntegers = "0.3.5"
 EllipsisNotation = "1"
 ITensors = "0.9"
-Optim = "1"
+Optim = "1, 2"
 QuadGK = "2.9"
 Random = "1.9.0"
 T4AITensorCompat = "0.8"