diff --git a/Project.toml b/Project.toml
index eb22636..ec44d5a 100644
--- a/Project.toml
+++ b/Project.toml
@@ -19,6 +19,7 @@ ArrayInterface = "7"
 ChainRulesCore = "1"
 ForwardDiff = "0.10.3, 1"
 MacroTools = "0.5"
+OrdinaryDiffEq = "6, 7"
 PreallocationTools = "0.4, 1.0"
 PrecompileTools = "1"
 RecursiveArrayTools = "3.1, 4"