diff --git a/Project.toml b/Project.toml
index 7e2dbce..d73251a 100644
--- a/Project.toml
+++ b/Project.toml
@@ -11,7 +11,7 @@ ModelingToolkit = "961ee093-0014-501f-94e3-6117800e7a78"
 [compat]
 CSV = "0.10"
 DataFrames = "1"
-ModelingToolkit = "9"
+ModelingToolkit = "8, 9"
 julia = "1.9"
 
 [extras]