diff --git a/Project.toml b/Project.toml
index 5b4dc169..ffeb6f6e 100644
--- a/Project.toml
+++ b/Project.toml
@@ -14,7 +14,7 @@ SparseArrays = "2f01184e-e22b-5df5-ae63-d93ebab69eaf"
 StaticArrays = "90137ffa-7385-5640-81b9-e52037218182"
 
 [compat]
-DocStringExtensions = "0.8"
+DocStringExtensions = "0.8, 0.9"
 FiniteDiff = "2"
 ForwardDiff = "0.10"
 RobotDynamics = "0.4.3"