diff --git a/Project.toml b/Project.toml
index 9e0c7fb23..48c14bbde 100644
--- a/Project.toml
+++ b/Project.toml
@@ -44,6 +44,7 @@ Electron = "1.1"
 GlobalSensitivityAnalysis = "0.0.6"
 GraphPlot = "0.3, 0.4"
 IteratorInterfaceExtensions = "^0.1.1, ^1"
+JSON = "0.21"
 TableTraits = "^0.4.1, ^1"
 VegaLite = "1.0"
 julia = "1"