diff --git a/Project.toml b/Project.toml
index d6ce04941..7779b147c 100644
--- a/Project.toml
+++ b/Project.toml
@@ -105,7 +105,7 @@ Images = "0.26"
 IncrementalInference = "0.34, 0.35"
 Interpolations = "0.14, 0.15"
 JLD2 = "0.3, 0.4"
-JSON = "0.20, 0.21"
+JSON = "0.20, 0.21, 1"
 JSON2 = "0.3, 0.4"
 JSON3 = "1"
 KernelDensityEstimate = "0.5"