diff --git a/Project.toml b/Project.toml
index 6034b4c..e4be775 100644
--- a/Project.toml
+++ b/Project.toml
@@ -23,7 +23,7 @@ PeriodicTableExt = "PeriodicTable"
 
 [compat]
 AnonymousEnums = "0.1"
-CrystallographyCore = "0.1, 0.2, 0.3"
+CrystallographyCore = "0.1, 0.2, 0.3, 0.4"
 Mendeleev = "0.2, 0.3, 1"
 Reexport = "1"
 StaticArrays = "0.8.3, 0.9, 0.10, 0.11, 0.12, 1"