diff --git a/update.bat b/update.bat
new file mode 100644
index 0000000..dee8b1d
--- /dev/null
+++ b/update.bat
@@ -0,0 +1,24 @@
+@echo off
+cd /d "%~dp0"
+title SteamPanel Updater
+chcp 65001 >nul
+
+if exist "venv\Scripts\python.exe" (
+    venv\Scripts\python.exe update.py
+    goto :end
+)
+
+python --version >nul 2>&1
+if errorlevel 1 (
+    echo.
+    echo [!] Python not found.
+    echo     Run run.bat first to set up the environment,
+    echo     or install Python from https://python.org
+    goto :end
+)
+
+python update.py
+
+:end
+echo.
+pause
diff --git a/update.py b/update.py
new file mode 100644
index 0000000..0de806a
--- /dev/null
+++ b/update.py
@@ -0,0 +1,282 @@
+import sys
+import os
+import subprocess
+import urllib.request
+import urllib.error
+import zipfile
+import shutil
+import hashlib
+import json
+import tempfile
+from pathlib import Path
+from datetime import datetime
+
+GITHUB_REPO = "daimyomizukagebay61/SteamPanel"
+BRANCH = "main"
+ROOT = Path(__file__).parent
+
+# dirs to never touch when copying from ZIP
+PROTECTED = {"data", "data_backup", "venv", ".git", "__pycache__"}
+
+
+# ── helpers ──────────────────────────────────────────────────────────────────
+
+def get_version():
+    ver_file = ROOT / "version.py"
+    if not ver_file.exists():
+        return "unknown"
+    try:
+        ns = {}
+        exec(ver_file.read_text(encoding="utf-8"), ns)
+        return ns.get("VERSION", "unknown")
+    except Exception:
+        return "unknown"
+
+
+def file_hash(path):
+    try:
+        return hashlib.md5(Path(path).read_bytes()).hexdigest()
+    except Exception:
+        return None
+
+
+def git(*args, capture=False):
+    kwargs = {"cwd": str(ROOT)}
+    if capture:
+        kwargs["capture_output"] = True
+        kwargs["text"] = True
+    return subprocess.run(["git", "--no-pager"] + list(args), **kwargs)
+
+
+def reinstall_requirements():
+    print("Installing dependencies...")
+    venv_pip = ROOT / "venv" / "Scripts" / "pip.exe"
+    if venv_pip.exists():
+        cmd = [str(venv_pip), "install", "-r", str(ROOT / "requirements.txt"), "-q"]
+    else:
+        cmd = [sys.executable, "-m", "pip", "install", "-r", str(ROOT / "requirements.txt"), "-q"]
+    subprocess.run(cmd)
+    hash_file = ROOT / "data" / ".req_hash"
+    hash_file.parent.mkdir(exist_ok=True)
+    hash_file.write_text(file_hash(ROOT / "requirements.txt") or "")
+
+
+def rebuild_frontend():
+    frontend = ROOT / "frontend"
+    if not frontend.exists():
+        return
+    if subprocess.run(["npm", "--version"], capture_output=True).returncode != 0:
+        print("[!] Node.js not found — skipping frontend rebuild.")
+        print("    If UI looks broken: cd frontend && npm install && npm run build")
+        return
+    print("Rebuilding frontend...")
+    subprocess.run(["npm", "install", "--silent"], cwd=str(frontend))
+    subprocess.run(["npm", "run", "build"], cwd=str(frontend))
+    print("Frontend rebuilt.")
+
+
+def download(url, dest):
+    req = urllib.request.Request(url, headers={"User-Agent": "SteamPanel-Updater"})
+    with urllib.request.urlopen(req, timeout=60) as resp:
+        total = int(resp.headers.get("Content-Length", 0))
+        done = 0
+        with open(dest, "wb") as f:
+            while True:
+                chunk = resp.read(65536)
+                if not chunk:
+                    break
+                f.write(chunk)
+                done += len(chunk)
+                if total:
+                    print(f"\r  {done * 100 // total:3d}%  {done / 1048576:.1f} MB", end="", flush=True)
+                else:
+                    print(f"\r  {done / 1048576:.1f} MB", end="", flush=True)
+    print()
+
+
+# ── git update path ───────────────────────────────────────────────────────────
+
+def update_via_git():
+    if subprocess.run(["git", "--version"], capture_output=True).returncode != 0:
+        print("[!] git not found. Install Git from https://git-scm.com")
+        return
+
+    print("Checking for updates...")
+    if git("fetch", "origin", BRANCH).returncode != 0:
+        print("[!] Failed to reach GitHub. Check your internet connection.")
+        return
+
+    local  = git("rev-parse", "HEAD",              capture=True).stdout.strip()
+    remote = git("rev-parse", f"origin/{BRANCH}",  capture=True).stdout.strip()
+
+    if local == remote:
+        print("\n[+] Already up to date.")
+        return
+
+    print("\nNew commits:")
+    print("-" * 40)
+    git("log", f"HEAD..origin/{BRANCH}", "--oneline")
+    print("-" * 40)
+
+    if input("\nUpdate now? [Y/N]: ").strip().upper() != "Y":
+        print("Cancelled.")
+        return
+
+    # stash local changes so pull is clean
+    stash = git("stash", capture=True)
+    had_stash = "No local changes" not in (stash.stdout or "")
+    if had_stash:
+        print("Local changes stashed.")
+
+    # backup branch as a safety net
+    backup = f"backup_{datetime.now().strftime('%Y-%m-%d_%H-%M-%S')}"
+    git("branch", backup)
+    print(f"Backup branch: {backup}")
+
+    req_hash_before      = file_hash(ROOT / "requirements.txt")
+    frontend_hash_before = file_hash(ROOT / "frontend" / "package.json")
+
+    print("Pulling updates...")
+    if git("pull", "origin", BRANCH).returncode != 0:
+        print("\n[!] Pull failed. Restoring backup branch...")
+        git("reset", "--hard", backup)
+        if had_stash:
+            git("stash", "pop")
+        return
+
+    if had_stash:
+        result = git("stash", "pop")
+        if result.returncode != 0:
+            print("[!] Could not restore stashed changes automatically.")
+            print(f"    Run: git stash pop   (or check: git stash list)")
+
+    new_ver = get_version()
+    print(f"\nUpdated: {local[:7]} -> {new_ver}")
+
+    if file_hash(ROOT / "requirements.txt") != req_hash_before:
+        reinstall_requirements()
+
+    if file_hash(ROOT / "frontend" / "package.json") != frontend_hash_before:
+        rebuild_frontend()
+
+    print(f"\n[+] Update complete! Run run.bat to start.")
+
+
+# ── ZIP download path ─────────────────────────────────────────────────────────
+
+def update_via_zip():
+    print("No .git folder — using GitHub release download.\n")
+
+    # fetch latest release info
+    api = f"https://api.github.com/repos/{GITHUB_REPO}/releases/latest"
+    zip_url = tag_name = None
+    try:
+        req = urllib.request.Request(api, headers={"User-Agent": "SteamPanel-Updater"})
+        with urllib.request.urlopen(req, timeout=10) as resp:
+            data = json.loads(resp.read())
+        zip_url  = data.get("zipball_url")
+        tag_name = data.get("tag_name", "latest")
+    except urllib.error.HTTPError as e:
+        if e.code != 404:
+            print(f"[!] GitHub API error: {e}")
+            return
+    except Exception as e:
+        print(f"[!] Failed to reach GitHub: {e}")
+        return
+
+    if not zip_url:
+        # no releases yet — grab main branch zipball
+        zip_url  = f"https://api.github.com/repos/{GITHUB_REPO}/zipball/{BRANCH}"
+        tag_name = BRANCH
+
+    current_ver = get_version()
+    print(f"Installed : {current_ver}")
+    print(f"Available : {tag_name}")
+
+    if input("\nDownload and install? [Y/N]: ").strip().upper() != "Y":
+        print("Cancelled.")
+        return
+
+    # backup data/ before touching anything
+    data_dir    = ROOT / "data"
+    data_backup = ROOT / "data_backup"
+    if data_dir.exists():
+        print("Backing up data/...")
+        if data_backup.exists():
+            shutil.rmtree(data_backup)
+        shutil.copytree(data_dir, data_backup)
+        print("Backed up to data_backup/")
+
+    with tempfile.TemporaryDirectory() as tmp:
+        zip_path = os.path.join(tmp, "update.zip")
+
+        print("Downloading...")
+        try:
+            download(zip_url, zip_path)
+        except Exception as e:
+            print(f"[!] Download failed: {e}")
+            return
+
+        req_hash_before      = file_hash(ROOT / "requirements.txt")
+        frontend_hash_before = file_hash(ROOT / "frontend" / "package.json")
+
+        print("Extracting...")
+        extract_dir = os.path.join(tmp, "src")
+        with zipfile.ZipFile(zip_path) as z:
+            z.extractall(extract_dir)
+
+        # GitHub always wraps in one top-level folder (reponame-sha/)
+        entries = os.listdir(extract_dir)
+        source = Path(extract_dir) / entries[0] if len(entries) == 1 else Path(extract_dir)
+
+        print("Installing...")
+        for item in source.iterdir():
+            if item.name in PROTECTED:
+                continue
+            dest = ROOT / item.name
+            if item.is_dir():
+                if dest.exists():
+                    shutil.rmtree(dest)
+                shutil.copytree(item, dest)
+            else:
+                shutil.copy2(item, dest)
+
+        # safety net: restore data if something went wrong
+        if not data_dir.exists() and data_backup.exists():
+            print("Restoring data/ from backup...")
+            shutil.copytree(data_backup, data_dir)
+
+        if file_hash(ROOT / "requirements.txt") != req_hash_before:
+            reinstall_requirements()
+        elif not (ROOT / "data" / ".req_hash").exists():
+            reinstall_requirements()
+
+        if file_hash(ROOT / "frontend" / "package.json") != frontend_hash_before:
+            rebuild_frontend()
+
+    new_ver = get_version()
+    if new_ver != current_ver:
+        print(f"\nUpdated: {current_ver} -> {new_ver}")
+
+    print("\n[+] Update complete! Run run.bat to start.")
+
+
+# ── entry point ───────────────────────────────────────────────────────────────
+
+def main():
+    print()
+    print("  SteamPanel Updater")
+    print("  ==================")
+    print(f"\n  Current version: {get_version()}\n")
+
+    if (ROOT / ".git").exists():
+        update_via_git()
+    else:
+        update_via_zip()
+
+
+if __name__ == "__main__":
+    try:
+        main()
+    except KeyboardInterrupt:
+        print("\nCancelled.")