diff --git a/Project.toml b/Project.toml
index 879d477d..0df4e410 100644
--- a/Project.toml
+++ b/Project.toml
@@ -38,7 +38,7 @@ FixedPointNumbers = "0.6, 0.7, 0.8"
 GR = "0.46, 0.47, 0.48, 0.49, 0.50"
 GeometryBasics = "0.2"
 GeometryTypes = "0.7, 0.8"
-JSON = "0.21"
+JSON = "0.21, 1"
 Measures = "0.3"
 NaNMath = "0.3"
 PGFPlotsX = "1.2.0"