diff --git a/Project.toml b/Project.toml
index ffe3a354a..145d0d21a 100644
--- a/Project.toml
+++ b/Project.toml
@@ -45,7 +45,7 @@ FilePaths = "0.8, 0.9"
 GlobalSensitivityAnalysis = "1.0"
 IterTools = "1.3"
 IteratorInterfaceExtensions = "0.1.1, 1"
-JSON = "0.21"
+JSON = "0.21, 1"
 MacroTools = "0.5"
 NamedArrays = "0.9, 0.10"
 ProgressMeter = "1.9"