diff --git a/Project.toml b/Project.toml
index 62e59e95..dd1b8ea8 100644
--- a/Project.toml
+++ b/Project.toml
@@ -19,7 +19,7 @@ TestItems = "1c621080-faea-4a02-84b6-bbd5e436b8fe"
 TrajectoryIndexingUtils = "6dad8b7f-dd9a-4c28-9b70-85b9a079bfc8"
 
 [compat]
-DirectTrajOpt = "0.8"
+DirectTrajOpt = "0.8, 0.9"
 Distributions = "0.25"
 ExponentialAction = "0.2"
 LinearAlgebra = "1.10, 1.11, 1.12"