diff --git a/Project.toml b/Project.toml
index 90243a7..2cc5e8a 100644
--- a/Project.toml
+++ b/Project.toml
@@ -16,7 +16,7 @@ Aqua = "0.8"
 EzXML = "1.1"
 MathML = "0.1.16"
 Memoize = "0.4.2"
-ModelingToolkit = "10"
+ModelingToolkit = "10, 11.11"
 OrdinaryDiffEq = "6.103"
 SafeTestsets = "0.1"
 Setfield = "1.1.1"