diff --git a/docs/Project.toml b/docs/Project.toml
index 555443ab..0bf82522 100644
--- a/docs/Project.toml
+++ b/docs/Project.toml
@@ -3,5 +3,5 @@ Documenter = "e30172f5-a6a5-5a46-863b-614d45cd2de4"
 Random = "9a3f8284-a2c9-5f02-9a11-845980a1fd5c"
 
 [compat]
-Documenter = "0.27"
+Documenter = "0.27, 1"
 julia = "1"