diff --git a/Project.toml b/Project.toml
index 68c36d62..f41595ec 100644
--- a/Project.toml
+++ b/Project.toml
@@ -31,7 +31,7 @@ DiffEqBase = "6"
 Downloads = "1"
 ForwardDiff = "0.10"
 JumpProcesses = "9"
-ModelingToolkit = "9"
+ModelingToolkit = "9.46.1"
 OrdinaryDiffEq = "6"
 PrecompileTools = "1"
 ReactionNetworkImporters = "0.15"