diff --git a/Project.toml b/Project.toml
index b9bbc394..60deb1e0 100644
--- a/Project.toml
+++ b/Project.toml
@@ -48,7 +48,7 @@ HomotopyContinuation = "2.9"
 JET = "0.9"
 JLD2 = "0.4.48"
 Latexify = "0.16"
-ModelingToolkit = "9.30"
+ModelingToolkit = "9.20"
 NonlinearSolve = "3.12"
 OrderedCollections = "1.6"
 OrdinaryDiffEq = "v6.82"