diff --git a/app/login/page.jsx b/app/login/page.jsx
index 2f098aa..063a4d2 100644
--- a/app/login/page.jsx
+++ b/app/login/page.jsx
@@ -5,6 +5,7 @@ import { useRouter } from 'next/navigation'
 import { FiMail, FiLock, FiUser, FiLogIn, FiUserPlus, FiSun, FiMoon } from 'react-icons/fi'
 import { motion } from 'framer-motion'
 import Link from 'next/link'
+import Turnstile from '@marsidev/react-turnstile'
 
 export default function LoginPage() {
   const [email, setEmail] = useState('')
@@ -13,6 +14,7 @@ export default function LoginPage() {
   const [loading, setLoading] = useState(false)
   const [error, setError] = useState('')
   const [theme, setTheme] = useState('light')
+  const [captchaToken, setCaptchaToken] = useState(null)
   const router = useRouter()
 
   useEffect(() => {
@@ -38,7 +40,8 @@ export default function LoginPage() {
         if (error) throw error
         router.push('/dashboard')
       } else {
-        const { error } = await supabase.auth.signUp({ email, password })
+        if (!captchaToken) throw new Error('Please complete captcha')
+        const { error } = await supabase.auth.signUp({ email, password, options: { captchaToken } })
         if (error) throw error
         alert('Check your email for confirmation!')
       }
@@ -135,6 +138,15 @@ export default function LoginPage() {
               </div>
             )}
 
+            {!isLogin && (
+              <div className="flex justify-center">
+                <Turnstile
+                  siteKey={process.env.NEXT_PUBLIC_TURNSTILE_SITE_KEY}
+                  onSuccess={(token) => setCaptchaToken(token)}
+                />
+              </div>
+            )}
+
             <button
               onClick={handleAuth}
               disabled={loading}
diff --git a/package-lock.json b/package-lock.json
index a361147..0a0d13b 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -9,6 +9,7 @@
       "version": "0.1.0",
       "dependencies": {
         "@gsap/react": "^2.1.2",
+        "@marsidev/react-turnstile": "^1.3.0",
         "@monaco-editor/react": "^4.7.0",
         "@supabase/auth-helpers-nextjs": "^0.10.0",
         "@supabase/ssr": "^0.6.1",
@@ -748,6 +749,16 @@
         "@jridgewell/sourcemap-codec": "^1.4.14"
       }
     },
+    "node_modules/@marsidev/react-turnstile": {
+      "version": "1.3.0",
+      "resolved": "https://registry.npmjs.org/@marsidev/react-turnstile/-/react-turnstile-1.3.0.tgz",
+      "integrity": "sha512-VO99Nynt+j4ETfMImQCj5LgbUKZ9mWPpy3RjP/3e/3vZu+FIphjEdU6g+cq4FeDoNshSxLlRzBTKcH5JMeM1GQ==",
+      "license": "MIT",
+      "peerDependencies": {
+        "react": "^17.0.2 || ^18.0.0 || ^19.0",
+        "react-dom": "^17.0.2 || ^18.0.0 || ^19.0"
+      }
+    },
     "node_modules/@monaco-editor/loader": {
       "version": "1.5.0",
       "resolved": "https://registry.npmjs.org/@monaco-editor/loader/-/loader-1.5.0.tgz",
diff --git a/package.json b/package.json
index 7464254..6f735ec 100644
--- a/package.json
+++ b/package.json
@@ -11,6 +11,7 @@
   },
   "dependencies": {
     "@gsap/react": "^2.1.2",
+    "@marsidev/react-turnstile": "^1.3.0",
     "@monaco-editor/react": "^4.7.0",
     "@supabase/auth-helpers-nextjs": "^0.10.0",
     "@supabase/ssr": "^0.6.1",