diff --git a/Project.toml b/Project.toml
index 85427cc..071c401 100644
--- a/Project.toml
+++ b/Project.toml
@@ -30,7 +30,7 @@ DashHtmlComponents = "2.0.0"
 DashTable = "5.0.0"
 DataStructures = "0.17, 0.18, 0.19"
 HTTP = "1"
-JSON = "0.21"
+JSON = "0.21, 1"
 JSON3 = "1.9"
 MD5 = "0.2"
 YAML = "0.4.7"