diff --git a/home/modules/git.nix b/home/modules/git.nix
index 8bb357e..92abffc 100644
--- a/home/modules/git.nix
+++ b/home/modules/git.nix
@@ -8,6 +8,10 @@
     enable = true;
     userName = "xqtc";
     userEmail = "xqtc@tutanota.com";
+    signing ={
+      key = "655F2C328563DC87FB2077CC2C064D095926D9D1";
+      signByDefault = true;
+    };
     extraConfig = {
       init = {
         defaultBranch = "main";