diff --git a/Project.toml b/Project.toml
index f0c99d9..cd7b429 100644
--- a/Project.toml
+++ b/Project.toml
@@ -60,7 +60,7 @@ DrWatson = "1.16, 2.0"
 FFTW = "1.2"
 FileIO = "1.4"
 JLD2 = "0.3, 0.4"
-JSON = "0.21"
+JSON = "0.21, 1"
 Measurements = "2.3"
 OnlineStats = "1"
 PkgBenchmark = "0.2"