diff --git a/lib/screens/auth/captcha.native.dart b/lib/screens/auth/captcha.native.dart
index 694b4727..2ef1f5c7 100644
--- a/lib/screens/auth/captcha.native.dart
+++ b/lib/screens/auth/captcha.native.dart
@@ -9,6 +9,7 @@ class CaptchaScreen extends ConsumerWidget {
     return showModalBottomSheet<String>(
       context: context,
       isScrollControlled: true,
+      isDismissible: false,
       builder: (context) => const CaptchaScreen(),
     );
   }
diff --git a/lib/screens/auth/captcha.web.dart b/lib/screens/auth/captcha.web.dart
index 997ede09..fe80717e 100644
--- a/lib/screens/auth/captcha.web.dart
+++ b/lib/screens/auth/captcha.web.dart
@@ -12,6 +12,7 @@ class CaptchaScreen extends ConsumerStatefulWidget {
   static Future<String?> show(BuildContext context) {
     return showModalBottomSheet<String>(
       context: context,
+      isDismissible: false,
       isScrollControlled: true,
       builder: (context) => const CaptchaScreen(),
     );