diff --git a/common.nix b/common.nix
index 8287b75..a145c14 100644
--- a/common.nix
+++ b/common.nix
@@ -476,6 +476,7 @@ in
       jdk # Java development kit
       nixfmt-rfc-style # official nix formatter
       ripgrep # some nice grep alternative
+      netcat-gnu # networking connection debugging
     ];
 
     programs = {
@@ -516,10 +517,19 @@ in
           p = "push";
           cl = "clone";
         };
+        delta = {
+          enable = true;
+        };
         extraConfig = {
           push = {
             autoSetupRemote = true;
           };
+          commit = {
+            gpgsign = true;
+          };
+          tag = {
+            gpgSign = true;
+          };
         };
       };