diff --git a/Project.toml b/Project.toml
index 4371d7e7..6cbc315e 100644
--- a/Project.toml
+++ b/Project.toml
@@ -21,7 +21,7 @@ StatsFuns = "4c63d2b9-4356-54db-8cca-17b64c39e42c"
 ArgCheck = "1, 2"
 Compat = "3"
 Distributions = "0.23.3"
-MappedArrays = "0.2.2"
+MappedArrays = "0.2.2, 0.3"
 NNlib = "0.6, 0.7"
 Reexport = "0.2"
 Requires = "0.5, 1"