diff --git a/docs/Project.toml b/docs/Project.toml
index 3a52a5d..88bd3c8 100644
--- a/docs/Project.toml
+++ b/docs/Project.toml
@@ -2,4 +2,4 @@
 Documenter = "e30172f5-a6a5-5a46-863b-614d45cd2de4"
 
 [compat]
-Documenter = "0.27"
+Documenter = "0.27, 1"