diff --git a/Project.toml b/Project.toml
index 5b454dfcb..8f1b3c02d 100644
--- a/Project.toml
+++ b/Project.toml
@@ -31,7 +31,7 @@ Statistics = "10745b16-79ce-11e8-11f9-7d13ad32a3b2"
 
 [compat]
 Cairo = "0.7, 0.8, 1.0"
-CategoricalArrays = "0.8"
+CategoricalArrays = "0.8, 0.9"
 Colors = "0.9, 0.10, 0.11, 0.12"
 Compose = "0.9"
 Contour = "0.5"