diff --git a/users/mary/desktop.nix b/users/mary/desktop.nix
index 62a5a4a..231fffd 100644
--- a/users/mary/desktop.nix
+++ b/users/mary/desktop.nix
@@ -136,7 +136,7 @@
       e = "emacsclient";
     };
     signing = {
-      key = "0x9F6E28D6ABA86BCD";
+      key = "0x918CEB263269C7A6";
       signByDefault = true;
     };
 
diff --git a/worlds/maryland.nix b/worlds/maryland.nix
index 6d30ffa..426963e 100644
--- a/worlds/maryland.nix
+++ b/worlds/maryland.nix
@@ -35,6 +35,8 @@ let
 
     boot.initrd.kernelModules = [ "amdgpu" ];
     boot.kernelParams = [ "radeon.cik_support=0" "amdgpu.cik_support=1" ];
+
+    boot.blacklistedKernelModules = [ "mt7921e" ];
     hardware.enableRedistributableFirmware = true;
     hardware.cpu.amd.updateMicrocode = true;