diff --git a/Project.toml b/Project.toml
index 025dde2..c7005f7 100644
--- a/Project.toml
+++ b/Project.toml
@@ -17,7 +17,7 @@ MultiObjectiveAlgorithmsPolyhedraExt = "Polyhedra"
 Combinatorics = "1"
 HiGHS = "1"
 Ipopt = "1"
-JSON = "0.21"
+JSON = "1"
 MathOptInterface = "1.19"
 Polyhedra = "0.8"
 Test = "1"