diff --git a/Project.toml b/Project.toml
index ef98e42..e4d925a 100644
--- a/Project.toml
+++ b/Project.toml
@@ -15,6 +15,7 @@ Random = "9a3f8284-a2c9-5f02-9a11-845980a1fd5c"
 [compat]
 DiffEqBase = ">= 5.15.0"
 DiffEqOperators = "4"
+ModelingToolkit = "0.9"
 julia = "1"
 
 [extras]