diff --git a/docs/Project.toml b/docs/Project.toml
index e27a797..9d3c507 100644
--- a/docs/Project.toml
+++ b/docs/Project.toml
@@ -3,6 +3,6 @@ Documenter = "e30172f5-a6a5-5a46-863b-614d45cd2de4"
 PythonOT = "3c485715-4278-42b2-9b5f-8f00e43c12ef"
 
 [compat]
-Documenter = "0.26"
+Documenter = "0.26, 0.27"
 PythonOT = "0.1"
 julia = "1"