diff --git a/modules/home/git.nix b/modules/home/git.nix
index 424ef81..9f1a294 100644
--- a/modules/home/git.nix
+++ b/modules/home/git.nix
@@ -2,9 +2,14 @@
   programs.git = {
     enable = true;
 
-    userName = "peprolinbot";
+    userName = "Pedro Rey Anca";
     userEmail = "personal@peprolinbot.com";
 
+    signing = {
+      signByDefault = true;
+      key = null; # Let GnuPG decide what signing key to use depending on commit’s author.
+    };
+
     extraConfig = {
       init.defaultBranch = "main";
       credential.helper = "store";