diff --git a/Project.toml b/Project.toml
index 029636424e..2136a5a382 100644
--- a/Project.toml
+++ b/Project.toml
@@ -50,7 +50,7 @@ FastPow = "0.1"
 FileIO = "1"
 ForwardDiff = "1"
 GPUArraysCore = "0.2"
-JSON = "0.21"
+JSON = "0.21, 1"
 KernelAbstractions = "0.9"
 MuladdMacro = "0.2"
 OrdinaryDiffEq = "6.91"