diff --git a/app/Controllers/Admin/Podcast.php b/app/Controllers/Admin/Podcast.php
index 1d10f9f2..05503ca2 100644
--- a/app/Controllers/Admin/Podcast.php
+++ b/app/Controllers/Admin/Podcast.php
@@ -156,6 +156,7 @@ class Podcast extends BaseController
             'copyright' => $this->request->getPost('copyright'),
             'block' => $this->request->getPost('block') === 'yes',
             'complete' => $this->request->getPost('complete') === 'yes',
+            'lock' => $this->request->getPost('lock') === 'yes',
             'created_by' => user(),
             'updated_by' => user(),
         ]);
@@ -244,10 +245,19 @@ class Podcast extends BaseController
                     ' ⎋</a>',
                 ]);
         }
-
         $nsItunes = $feed->channel[0]->children(
             'http://www.itunes.com/dtds/podcast-1.0.dtd'
         );
+        $nsPodcast = $feed->channel[0]->children(
+            'https://github.com/Podcastindex-org/podcast-namespace/blob/main/docs/1.0.md'
+        );
+
+        if ((string) $nsPodcast->locked === 'yes') {
+            return redirect()
+                ->back()
+                ->withInput()
+                ->with('errors', [lang('PodcastImport.lock_import')]);
+        }
 
         $podcast = new \App\Entities\Podcast([
             'name' => $this->request->getPost('name'),
@@ -453,6 +463,7 @@ class Podcast extends BaseController
         $this->podcast->block = $this->request->getPost('block') === 'yes';
         $this->podcast->complete =
             $this->request->getPost('complete') === 'yes';
+        $this->podcast->lock = $this->request->getPost('lock') === 'yes';
         $this->updated_by = user();
 
         $db = \Config\Database::connect();
diff --git a/app/Database/Migrations/2020-05-30-101500_add_podcasts.php b/app/Database/Migrations/2020-05-30-101500_add_podcasts.php
index 018315cf..96633865 100644
--- a/app/Database/Migrations/2020-05-30-101500_add_podcasts.php
+++ b/app/Database/Migrations/2020-05-30-101500_add_podcasts.php
@@ -79,6 +79,10 @@ class AddPodcasts extends Migration
                 'constraint' => 1024,
                 'null' => true,
             ],
+            'episode_description_footer' => [
+                'type' => 'TEXT',
+                'null' => true,
+            ],
             'block' => [
                 'type' => 'TINYINT',
                 'constraint' => 1,
@@ -89,19 +93,12 @@ class AddPodcasts extends Migration
                 'constraint' => 1,
                 'default' => 0,
             ],
-            'episode_description_footer' => [
-                'type' => 'TEXT',
-                'null' => true,
-            ],
-            'created_by' => [
-                'type' => 'INT',
-                'constraint' => 11,
-                'unsigned' => true,
-            ],
-            'updated_by' => [
-                'type' => 'INT',
-                'constraint' => 11,
-                'unsigned' => true,
+            'lock' => [
+                'type' => 'TINYINT',
+                'constraint' => 1,
+                'comment' =>
+                    'This tells other podcast platforms whether they are allowed to import this feed.',
+                'default' => 1,
             ],
             'imported_feed_url' => [
                 'type' => 'VARCHAR',
@@ -117,6 +114,16 @@ class AddPodcasts extends Migration
                     'The RSS new feed URL if this podcast is moving out, NULL otherwise.',
                 'null' => true,
             ],
+            'created_by' => [
+                'type' => 'INT',
+                'constraint' => 11,
+                'unsigned' => true,
+            ],
+            'updated_by' => [
+                'type' => 'INT',
+                'constraint' => 11,
+                'unsigned' => true,
+            ],
             'created_at' => [
                 'type' => 'TIMESTAMP',
             ],
diff --git a/app/Entities/Podcast.php b/app/Entities/Podcast.php
index f60e44dc..e64cd5bc 100644
--- a/app/Entities/Podcast.php
+++ b/app/Entities/Podcast.php
@@ -76,13 +76,14 @@ class Podcast extends Entity
         'owner_email' => '?string',
         'type' => 'string',
         'copyright' => '?string',
+        'episode_description_footer' => '?string',
         'block' => 'boolean',
         'complete' => 'boolean',
-        'episode_description_footer' => '?string',
-        'created_by' => 'integer',
-        'updated_by' => 'integer',
+        'lock' => 'boolean',
         'imported_feed_url' => '?string',
         'new_feed_url' => '?string',
+        'created_by' => 'integer',
+        'updated_by' => 'integer',
     ];
 
     /**
diff --git a/app/Helpers/rss_helper.php b/app/Helpers/rss_helper.php
index 9f17a2f7..78413378 100644
--- a/app/Helpers/rss_helper.php
+++ b/app/Helpers/rss_helper.php
@@ -21,8 +21,11 @@ function get_rss_feed($podcast)
 
     $itunes_namespace = 'http://www.itunes.com/dtds/podcast-1.0.dtd';
 
+    $podcast_namespace =
+        'https://github.com/Podcastindex-org/podcast-namespace/blob/main/docs/1.0.md';
+
     $rss = new SimpleRSSElement(
-        "<?xml version='1.0' encoding='utf-8'?><rss version='2.0' xmlns:itunes='$itunes_namespace' xmlns:content='http://purl.org/rss/1.0/modules/content/'></rss>"
+        "<?xml version='1.0' encoding='utf-8'?><rss version='2.0' xmlns:itunes='$itunes_namespace' xmlns:podcast='$podcast_namespace' xmlns:content='http://purl.org/rss/1.0/modules/content/'></rss>"
     );
 
     $channel = $rss->addChild('channel');
@@ -60,7 +63,9 @@ function get_rss_feed($podcast)
     $itunes_image = $channel->addChild('image', null, $itunes_namespace);
     $itunes_image->addAttribute('href', $podcast->image->original_url);
     $channel->addChild('language', $podcast->language);
-
+    $channel
+        ->addChild('locked', $podcast->lock ? 'yes' : 'no', $podcast_namespace)
+        ->addAttribute('owner', $podcast->owner_email);
     // set main category first, then other categories as apple
     add_category_tag($channel, $podcast->category);
     foreach ($podcast->other_categories as $other_category) {
diff --git a/app/Language/en/Podcast.php b/app/Language/en/Podcast.php
index fc54298c..d979ae78 100644
--- a/app/Language/en/Podcast.php
+++ b/app/Language/en/Podcast.php
@@ -65,6 +65,9 @@ return [
         'status_section_subtitle' => 'Dead or alive?',
         'block' => 'Podcast should be hidden from all platforms',
         'complete' => 'Podcast will not be having new episodes',
+        'lock' => 'Podcast is locked for export',
+        'lock_hint' =>
+            'The purpose is to tell other podcast platforms whether they are allowed to import this feed. A value of yes means that any attempt to import this feed into a new platform should be rejected.',
         'submit_create' => 'Create podcast',
         'submit_edit' => 'Save podcast',
     ],
diff --git a/app/Language/en/PodcastImport.php b/app/Language/en/PodcastImport.php
index d914557a..5660a280 100644
--- a/app/Language/en/PodcastImport.php
+++ b/app/Language/en/PodcastImport.php
@@ -40,5 +40,7 @@ return [
         'Use this if your podcast does not have a season number but wish to set one during import. Leave blank otherwise.',
     'max_episodes' => 'Maximum number of episodes to import',
     'max_episodes_hint' => 'Leave blank to import all episodes',
+    'lock_import' =>
+        'This feed is protected. You cannot import it. If you are the owner, unprotect it on the origin platform.',
     'submit' => 'Import podcast',
 ];
diff --git a/app/Language/fr/Podcast.php b/app/Language/fr/Podcast.php
index 0452bbc6..8fe3ad14 100644
--- a/app/Language/fr/Podcast.php
+++ b/app/Language/fr/Podcast.php
@@ -66,6 +66,9 @@ return [
         'status_section_subtitle' => 'Vivant ou mort ?',
         'block' => 'Le podcast doit être masqué sur toutes les plateformes',
         'complete' => 'Le podcast n’aura plus de nouveaux épisodes.',
+        'lock' => 'Le podcast est fermé à l’export',
+        'lock_hint' =>
+            'Le but est d’indiquer aux autres plates-formes de podcast si elles sont autorisées à importer ce flux. La valeur « oui » signifie que toute tentative d’importation de ce flux dans une nouvelle plateforme doit être rejetée.',
         'submit_create' => 'Créer le podcast',
         'submit_edit' => 'Enregistrer le podcast',
     ],
diff --git a/app/Language/fr/PodcastImport.php b/app/Language/fr/PodcastImport.php
index c7d03e0c..539d0609 100644
--- a/app/Language/fr/PodcastImport.php
+++ b/app/Language/fr/PodcastImport.php
@@ -41,5 +41,7 @@ return [
         'Utilisez ceci si le podcast à importer ne contient pas de numéros de saison mais que vous souhaitez en définir un. Laissez vide sinon.',
     'max_episodes' => 'Nombre maximum d’épisodes à importer',
     'max_episodes_hint' => 'Laissez vide pour importer tous les épisodes',
+    'lock_import' =>
+        'Ce flux est protégé. Vous ne pouvez pas l’importer. Si en vous êtes le propriétaire, déprotégez-le sur la plate-forme d’origine.',
     'submit' => 'Importer le podcast',
 ];
diff --git a/app/Models/PodcastModel.php b/app/Models/PodcastModel.php
index 1fd98403..84b26e6b 100644
--- a/app/Models/PodcastModel.php
+++ b/app/Models/PodcastModel.php
@@ -32,6 +32,7 @@ class PodcastModel extends Model
         'copyright',
         'block',
         'complete',
+        'lock',
         'created_by',
         'updated_by',
         'imported_feed_url',
diff --git a/app/Views/admin/podcast/create.php b/app/Views/admin/podcast/create.php
index 006dd61a..1ee84141 100644
--- a/app/Views/admin/podcast/create.php
+++ b/app/Views/admin/podcast/create.php
@@ -262,6 +262,13 @@
     old('complete', false)
 ) ?>
 
+<?= form_switch(
+    lang('Podcast.form.lock'),
+    ['id' => 'lock', 'name' => 'lock'],
+    'yes',
+    old('lock', $podcast->lock)
+) ?>
+
 <?= form_section_close() ?>
 
 
diff --git a/app/Views/admin/podcast/edit.php b/app/Views/admin/podcast/edit.php
index 2a3933b7..b2c02869 100644
--- a/app/Views/admin/podcast/edit.php
+++ b/app/Views/admin/podcast/edit.php
@@ -269,7 +269,16 @@
     lang('Podcast.form.complete'),
     ['id' => 'complete', 'name' => 'complete'],
     'yes',
-    old('complete', $podcast->complete)
+    old('complete', $podcast->complete),
+    'mb-2'
+) ?>
+
+<?= form_switch(
+    lang('Podcast.form.lock') .
+        hint_tooltip(lang('Podcast.form.lock_hint'), 'ml-1'),
+    ['id' => 'lock', 'name' => 'lock'],
+    'yes',
+    old('lock', $podcast->lock)
 ) ?>
 
 <?= form_section_close() ?>