diff --git a/home.nix b/home.nix
index bd9addc..b254ba9 100644
--- a/home.nix
+++ b/home.nix
@@ -174,10 +174,17 @@ in {
         fsync = "committed";
       };
 
+      user.signingKey = "key::sk-ssh-ed25519@openssh.com AAAAGnNrLXNzaC1lZDI1NTE5QG9wZW5zc2guY29tAAAAICczPHRwY9MAwDGlcB0QgMOJjcpLJhVU3covrW9RBS62AAAABHNzaDo= primary";
+
       init.defaultBranch = "main";
       pull.rebase = true;
       push.autoSetupRemote = true;
       rebase.autoStash = true;
+
+      gpg.format = "ssh";
+      commit.gpgSign = true;
+      push.gpgSign = true;
+      tag.gpgSign = true;
     };
   };
 
diff --git a/module.nix b/module.nix
index 932c01e..490cf74 100644
--- a/module.nix
+++ b/module.nix
@@ -25,7 +25,9 @@ in {
     isNormalUser = true;
     shell = config.programs.fish.package;
     openssh.authorizedKeys.keys = [
-      "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIGOTvXiNHTXq9wkcxdVOblHVyvcAaCfxmJp/CXI4rzMj"
+      "sk-ssh-ed25519@openssh.com AAAAGnNrLXNzaC1lZDI1NTE5QG9wZW5zc2guY29tAAAAICczPHRwY9MAwDGlcB0QgMOJjcpLJhVU3covrW9RBS62AAAABHNzaDo= primary"
+      "sk-ssh-ed25519@openssh.com AAAAGnNrLXNzaC1lZDI1NTE5QG9wZW5zc2guY29tAAAAIAgnEAwe59/yY/U55y7WxGa/QI20/XMQEsQvs1/6LitRAAAABHNzaDo= backup"
+      "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIGOTvXiNHTXq9wkcxdVOblHVyvcAaCfxmJp/CXI4rzMj legacy"
     ];
   };
 }