diff --git a/Project.toml b/Project.toml
index b610a7b..e050e43 100644
--- a/Project.toml
+++ b/Project.toml
@@ -7,4 +7,4 @@ version = "1.0.0"
 ModelingToolkit = "961ee093-0014-501f-94e3-6117800e7a78"
 
 [compat]
-ModelingToolkit = "8, 9"
+ModelingToolkit = "9"