diff --git a/docs/Project.toml b/docs/Project.toml
index 6bb99e1024..c24628b4fd 100644
--- a/docs/Project.toml
+++ b/docs/Project.toml
@@ -3,4 +3,4 @@ Documenter = "e30172f5-a6a5-5a46-863b-614d45cd2de4"
 OrdinaryDiffEq = "1dea7af3-3e70-54e6-95c3-0bf5283fa5ed"
 
 [compat]
-Documenter = "0.27"
+Documenter = "0.27, 1"