diff --git a/modules/home-manager/git/default.nix b/modules/home-manager/git/default.nix
index 7b79e92..c9d9063 100644
--- a/modules/home-manager/git/default.nix
+++ b/modules/home-manager/git/default.nix
@@ -22,7 +22,9 @@
           l = "log --all --oneline --graph";
         };
         init.defaultBranch = "main";
-        user.signingkey = "A7DA689CB3B078EC";
+
+        gpg.format = "ssh";
+        user.signingkey = "~/.ssh/id_ed25519.pub";
 
         credential.helper = "osxkeychain";
         column.ui = "auto";