diff --git a/oscar/configuration.nix b/oscar/configuration.nix
index 1d678aa..762d581 100644
--- a/oscar/configuration.nix
+++ b/oscar/configuration.nix
@@ -252,6 +252,7 @@
     programs.git = {
       enable = true;
       lfs.enable = true;
+      signing.format = "openpgp";
       # TODO: delta or diff-so-fancy or difftastic
       settings = {
         user.name = "Chandler Swift";
diff --git a/sam/configuration.nix b/sam/configuration.nix
index 20333f6..4d261ff 100644
--- a/sam/configuration.nix
+++ b/sam/configuration.nix
@@ -171,6 +171,7 @@
     programs.git = {
       enable = true;
       lfs.enable = true;
+      signing.format = "openpgp";
       # TODO: delta or diff-so-fancy or difftastic
       settings = {
         user.name = "Chandler Swift";