diff --git a/docs/Project.toml b/docs/Project.toml
index e64ac88..471d1bb 100644
--- a/docs/Project.toml
+++ b/docs/Project.toml
@@ -12,5 +12,5 @@ path = ".."
 Documenter = "1"
 ITensorFormatter = "0.2.27"
 ITensorGaussianMPS = "0.1"
-ITensorMPS = "0.3"
+ITensorMPS = "0.3, 0.4"
 LinearAlgebra = "1.10"