diff --git a/Project.toml b/Project.toml
index 17d6ad72..7e1cfc60 100644
--- a/Project.toml
+++ b/Project.toml
@@ -19,7 +19,7 @@ CliqueTreesExt = "CliqueTrees"
 [compat]
 Aqua = "0.8"
 ArrayLayouts = "1.6.0"
-CliqueTrees = "0.5"
+CliqueTrees = "0.5, 1"
 Documenter = "1"
 FillArrays = "1.3"
 GenericLinearAlgebra = "0.3"