diff --git a/README.md b/README.md
index cac98f4..4cf4e13 100644
--- a/README.md
+++ b/README.md
@@ -42,3 +42,33 @@ Add the following to your nix configuration:
 ```
 
 ## Modules
+
+### helium-sync
+
+#### NixOS
+```nix
+{
+  inputs.imnyang.url = "git+https://git.mizuki.guru/imnyang/nix-packages.git";
+  outputs = { self, nixpkgs, imnyang }: {
+    nixosConfigurations.my-host = nixpkgs.lib.nixosSystem {
+      modules = [
+        imnyang.nixosModules.helium-sync
+      ];
+    };
+  };
+}
+```
+
+#### Home Manager
+```nix
+{
+  inputs.imnyang.url = "git+https://git.mizuki.guru/imnyang/nix-packages.git";
+  outputs = { self, home-manager, imnyang, ... }: {
+    homeConfigurations.my-user = home-manager.lib.homeManagerConfiguration {
+      modules = [
+        imnyang.homeManagerModules.helium-sync
+      ];
+    };
+  };
+}
+```
diff --git a/flake.nix b/flake.nix
index 2d68e32..bb164b2 100644
--- a/flake.nix
+++ b/flake.nix
@@ -15,6 +15,7 @@
       xcursor-mizuki = final.callPackage ./pkgs/xcursor-mizuki/default.nix { };
       pjsk-cursor = final.callPackage ./pkgs/pjsk-cursor/default.nix { };
       helium = final.callPackage ./pkgs/helium/default.nix { };
+      helium-sync = final.callPackage ./pkgs/helium-sync/default.nix { };
       vscode-insiders = final.callPackage ./pkgs/vscode-insiders/default.nix { };
     };
 
@@ -26,13 +27,19 @@
   in {
     overlays.default = overlay;
 
+    nixosModules.helium-sync = import ./modules/helium-sync.nix;
+    homeManagerModules.helium-sync = import ./modules/helium-sync-hm.nix;
+
     packages.${system} = {
       inherit (pkgs) 
         waterfox-bin 
         xcursor-mizuki 
         pjsk-cursor 
         helium 
+        helium-sync 
         vscode-insiders;
+      
+      default = pkgs.helium; # 예시로 하나를 기본값으로 지정
     };
 
     nixConfig = {
diff --git a/pkgs/helium-sync/default.nix b/pkgs/helium-sync/default.nix
new file mode 100644
index 0000000..db06a38
--- /dev/null
+++ b/pkgs/helium-sync/default.nix
@@ -0,0 +1,27 @@
+{
+  lib,
+  buildGoModule,
+  fetchFromGitHub,
+}:
+buildGoModule rec {
+  pname = "helium-sync";
+  version = "0.4.0";
+
+  src = fetchFromGitHub {
+    owner = "imnyang";
+    repo = "helium-sync";
+    rev = "v${version}";
+    hash = "sha256-ARd2S9c5iFVvSwFTyZjEB2w1l54vvYBXKZTESWpCqvw=";
+  };
+
+  vendorHash = "sha256-sWi8QV1uMjfgRMATjXb/qCp6IvBQojtLI3Gr2BHS9Hs=";
+
+  subPackages = [ "cmd/helium-sync" ];
+
+  meta = {
+    description = "Synchronize selected Helium browser profile data across devices using Amazon S3";
+    homepage = "https://github.com/imnyang/helium-sync";
+    license = lib.licenses.mit;
+    mainProgram = "helium-sync";
+  };
+}