diff --git a/Project.toml b/Project.toml
index 9dd8d96..8c95ab0 100644
--- a/Project.toml
+++ b/Project.toml
@@ -10,6 +10,7 @@ RecursiveArrayTools = "731186ca-8d62-57ce-b412-fbd966d074cd"
 [compat]
 OffsetArrays = "0.9, 0.10, 0.11"
 RecursiveArrayTools = "0, 1"
+julia = "1"
 
 [extras]
 Test = "8dfed614-e22c-5e08-85e1-65c5234f0b40"