diff --git a/development.nix b/development.nix
index c517268..96eba5d 100644
--- a/development.nix
+++ b/development.nix
@@ -9,6 +9,7 @@
 			user = {
 				email = "vili.m.sinerva@gmail.com";
 				name = "Vili Sinervä";
+				signingkey = "/home/vili/.ssh/id_ed25519.pub";
 			};
 			merge = {
 				ff = "true";
@@ -16,6 +17,8 @@
 			pull = {
 				ff = "only";
 			};
+			gpg.format = "ssh";
+			commit.gpgsign = "true";
 		};
 	};