diff --git a/Project.toml b/Project.toml
index 1b20562..057c45b 100644
--- a/Project.toml
+++ b/Project.toml
@@ -5,6 +5,9 @@ version = "1.0.0"
 [deps]
 Mmap = "a63ad114-7e13-5084-954f-fe012c677804"
 
+[compat]
+julia = "1.6"
+
 [extras]
 Random = "9a3f8284-a2c9-5f02-9a11-845980a1fd5c"
 Test = "8dfed614-e22c-5e08-85e1-65c5234f0b40"