diff --git a/Project.toml b/Project.toml
index f09029a..d3fc422 100644
--- a/Project.toml
+++ b/Project.toml
@@ -31,7 +31,7 @@ DataStructures = "0.17, 0.18, 0.19"
 DateTimes64 = "1"
 DiskArrays = "0.4.2"
 HTTP = "^1.3"
-JSON = "0.21"
+JSON = "0.21, 1"
 OffsetArrays = "0.11, 1.0"
 OpenSSL = "1"
 URIs = "1"