diff --git a/Project.toml b/Project.toml
index ed83fb9..9b8080f 100644
--- a/Project.toml
+++ b/Project.toml
@@ -17,7 +17,7 @@ Statistics = "10745b16-79ce-11e8-11f9-7d13ad32a3b2"
 Tables = "bd369af6-aec1-5ad0-b16a-f7cc5008161c"
 
 [compat]
-CategoricalArrays = "0.10"
+CategoricalArrays = "0.10, 1"
 ColorTypes = "0.10.3, 0.11, 0.12"
 ComputationalResources = "0.3.2"
 Flux = "0.14, 0.15, 0.16"