diff --git a/linux/blitzar/gui.nix b/linux/blitzar/gui.nix
index fc907b3..0bf6bf1 100644
--- a/linux/blitzar/gui.nix
+++ b/linux/blitzar/gui.nix
@@ -39,6 +39,10 @@ let usr = config.constants.userName; in {
       ]);
       programs = {
         firefox.enable = true;
+        git.signing = {
+          key = "0x6A815D4CB1637AAC";
+          signByDefault = true;
+        };
         gpg = {
           enable = true;
           homedir = "${xdgCfg.dataHome}/gnupg";