diff --git a/Project.toml b/Project.toml
index d4f63e7..fca75a0 100644
--- a/Project.toml
+++ b/Project.toml
@@ -2,6 +2,9 @@ name = "PooledArrays"
 uuid = "2dfb63ee-cc39-5dd5-95bd-886bf059d720"
 version = "0.5.2"
 
+[compat]
+julia = "0.7, 1"
+
 [extras]
 Test = "8dfed614-e22c-5e08-85e1-65c5234f0b40"