diff --git a/Project.toml b/Project.toml
index b7873f2..75b61bd 100644
--- a/Project.toml
+++ b/Project.toml
@@ -27,7 +27,7 @@ Constraints = "0.5"
 Dates = "1"
 Dictionaries = "0.4"
 Distributed = "1"
-JSON = "0.21"
+JSON = "0.21, 1"
 Lazy = "0.15"
 Logging = "1"
 OrderedCollections = "1"