diff --git a/Project.toml b/Project.toml
index e1956f0..c646085 100644
--- a/Project.toml
+++ b/Project.toml
@@ -14,7 +14,7 @@ StructArrays = "09ab397b-f2b6-538f-b94a-2f83cf4a842a"
 
 [compat]
 EDM4hep = "0.4.0"
-JSON = "0.21"
+JSON = "0.21, 1"
 JetReconstruction = "1.0"
 LorentzVectorHEP = "0.1.6"
 ONNXRunTime = "1.3.1"