diff --git a/Project.toml b/Project.toml
index 658beab4..5718e07a 100644
--- a/Project.toml
+++ b/Project.toml
@@ -79,7 +79,7 @@ FunctionalStateMachine = "0.2.9"
 JSON3 = "1"
 KernelDensityEstimate = "0.5.6"
 ManifoldDiff = "0.3"
-Manifolds = "0.8.15"
+Manifolds = "0.8.15, 0.9"
 ManifoldsBase = "0.13.12, 0.14, 0.15"
 Manopt = "0.4.27"
 MetaGraphs = "0.7"