diff --git a/home-manager/modules/git.nix b/home-manager/modules/git.nix
index 909d258..b218f38 100644
--- a/home-manager/modules/git.nix
+++ b/home-manager/modules/git.nix
@@ -75,9 +75,10 @@
           user = {
             email = "breidenstein@denic.de";
             name = "Felix Breidenstein";
+            signingKey = "DC89E09ED2749442";
           };
           commit = {
-            gpgSign = false;
+            gpgSign = true;
           };
         };
       }