diff --git a/Project.toml b/Project.toml
index dad1735..cf5b2bb 100644
--- a/Project.toml
+++ b/Project.toml
@@ -26,7 +26,7 @@ ACTRModels = "v0.6.0, 0.7, 0.10, 0.11, 0.12, 0.13"
 ArgCheck = "2.1.0"
 Cairo = "1.0.0"
 ColorSchemes = "3.10.0"
-Colors = "0.12,0.14"
+Colors = "0.12,0.14, 0.13"
 ConcreteStructs = "v0.2.0"
 Crayons = "4.0.0"
 Distributions = "0.23,0.24, 0.25"