diff --git a/Project.toml b/Project.toml
index bb87c9a6..597527d9 100644
--- a/Project.toml
+++ b/Project.toml
@@ -41,7 +41,7 @@ IJulia = "1.24"
 Ipopt = "1.4"
 JLD2 = "0.4"
 LaTeXStrings = "1.3"
-Manifolds = "0.8"
+Manifolds = "0.8, 0.9"
 MathOptInterface = "1.20"
 NamedTrajectories = "0.1"
 Reexport = "1.2"