diff --git a/Project.toml b/Project.toml
index 747a19ec..293f5616 100644
--- a/Project.toml
+++ b/Project.toml
@@ -27,7 +27,7 @@ DiffResults = "1.1"
 DiffRules = "1.4"
 DiffTests = "0.1"
 IrrationalConstants = "0.1, 0.2"
-JET = "0.9, 0.10, 0.11"
+JET = "0.9, 0.10, 0.11, 0.12"
 LogExpFunctions = "0.3, 1"
 NaNMath = "1"
 Preferences = "1"