diff --git a/composer.json b/composer.json
index 6be24a3..67481ae 100644
--- a/composer.json
+++ b/composer.json
@@ -32,7 +32,7 @@
             "name": "Captcha",
             "slug": "captcha",
             "description": "Protect your Statamic forms using a Captcha service",
-            "version": "1.4.0"
+            "version": "1.5.0"
         },
         "laravel": {
             "providers": [
diff --git a/config/captcha.php b/config/captcha.php
index 453a1e3..07bc2cd 100644
--- a/config/captcha.php
+++ b/config/captcha.php
@@ -6,6 +6,7 @@
     'secret' => env('CAPTCHA_SECRET', ''),
     'collections' => [],
     'forms' => [],
+    'user_login' => false,
     'user_registration' => false,
     'error_message' => 'Captcha failed.',
     'disclaimer' => '',
diff --git a/src/CaptchaServiceProvider.php b/src/CaptchaServiceProvider.php
index 049ce2c..d872a11 100644
--- a/src/CaptchaServiceProvider.php
+++ b/src/CaptchaServiceProvider.php
@@ -4,7 +4,9 @@
 
 use AryehRaber\Captcha\Listeners\ValidateEntry;
 use AryehRaber\Captcha\Listeners\ValidateFormSubmission;
+use AryehRaber\Captcha\Listeners\ValidateUserLogin;
 use AryehRaber\Captcha\Listeners\ValidateUserRegistration;
+use Illuminate\Auth\Events\Login;
 use Statamic\Events\EntrySaving;
 use Statamic\Events\FormSubmitted;
 use Statamic\Events\UserRegistering;
@@ -21,6 +23,7 @@ class CaptchaServiceProvider extends AddonServiceProvider
     protected $listen = [
         EntrySaving::class => [ValidateEntry::class],
         FormSubmitted::class => [ValidateFormSubmission::class],
+        Login::class => [ValidateUserLogin::class],
         UserRegistering::class => [ValidateUserRegistration::class],
     ];
 
diff --git a/src/Listeners/ValidateUserLogin.php b/src/Listeners/ValidateUserLogin.php
new file mode 100644
index 0000000..452fd21
--- /dev/null
+++ b/src/Listeners/ValidateUserLogin.php
@@ -0,0 +1,37 @@
+<?php
+
+namespace AryehRaber\Captcha\Listeners;
+
+use AryehRaber\Captcha\Captcha;
+use Illuminate\Auth\Events\Login;
+use Illuminate\Validation\ValidationException;
+
+class ValidateUserLogin
+{
+    protected $captcha;
+
+    public function __construct(Captcha $captcha)
+    {
+        $this->captcha = $captcha;
+    }
+
+    public function handle(Login $event)
+    {
+        $user = $event->user;
+
+        if (! $this->shouldVerify()) {
+            return $user;
+        }
+
+        if ($this->captcha->verify()->invalidResponse()) {
+            throw ValidationException::withMessages(['captcha' => config('captcha.error_message')]);
+        }
+
+        return $user;
+    }
+
+    protected function shouldVerify()
+    {
+        return config('captcha.user_login', false);
+    }
+}