diff --git a/modules/nixos/deertopia/gitea.nix b/modules/nixos/deertopia/gitea.nix
index adecafc..0b5073a 100644
--- a/modules/nixos/deertopia/gitea.nix
+++ b/modules/nixos/deertopia/gitea.nix
@@ -94,6 +94,7 @@ in {
             # ko
             "공사 중:" "공사중:" "중:" "[중]" "中:" "[中]"
           ];
+          DEFAULT_MERGE_STYLE = "rebase";
         };
         mailer = {
           ENABLED = true;