diff --git a/Project.toml b/Project.toml
index 8e15c2f..40b4875 100644
--- a/Project.toml
+++ b/Project.toml
@@ -15,7 +15,7 @@ Statistics = "10745b16-79ce-11e8-11f9-7d13ad32a3b2"
 SuiteSparse = "4607b0f0-06f3-5cda-b6b1-a6196a1729e9"
 
 [compat]
-JSON = "0.21"
+JSON = "0.21, 1"
 LazyArtifacts = "1"
 LinearAlgebra = "1"
 MAT = "0.10, 0.11"