diff --git a/modules/programs/tirith.nix b/modules/programs/tirith.nix
index d8703d3e..c0fa9688 100644
--- a/modules/programs/tirith.nix
+++ b/modules/programs/tirith.nix
@@ -38,7 +38,7 @@ in
           fail_mode = "open";
           allow_bypass = true;
           severity_overrides = {
-            docker_untrusted_registry = "critical";
+            docker_untrusted_registry = "CRITICAL";
           };
         }
       '';