diff --git a/Project.toml b/Project.toml
index 01da0cdd0..c0d2d80f2 100644
--- a/Project.toml
+++ b/Project.toml
@@ -57,7 +57,7 @@ GPUArrays = "8, 9, 10, 11"
 Geant4 = "0.1.13, 0.2"
 Interpolations = "0.14, 0.15, 0.16"
 IntervalSets = "0.6, 0.7"
-JSON = "0.21.2"
+JSON = "0.21.2, 1"
 KernelAbstractions = "0.8, 0.9"
 LaTeXStrings = "1.1"
 LightXML = "0.9"