diff --git a/oe_theme.theme b/oe_theme.theme
index e6500d22b..f5f013dc1 100644
--- a/oe_theme.theme
+++ b/oe_theme.theme
@@ -1668,8 +1668,7 @@ function oe_theme_preprocess_field__media__oe_media_iframe__video_iframe__oe_the
  *   Prepared ratio to be used in templates.
  */
 function _oe_theme_get_oe_media_iframe_ratio(MediaInterface $media): string {
-  $ratio = $media->get('oe_media_iframe_ratio')->value ?? 'custom';
-  return str_replace('_', '-', $ratio);
+  return $media->get('oe_media_iframe_ratio')->isEmpty() ? '' : str_replace('_', '-', $media->get('oe_media_iframe_ratio')->value);
 }
 
 /**
diff --git a/package.json b/package.json
index abad941db..3003e0623 100644
--- a/package.json
+++ b/package.json
@@ -64,8 +64,8 @@
     "@ecl/vanilla-utility-background": "3.6.0",
     "@ecl/vanilla-utility-border": "3.6.0",
     "chokidar-cli": "1.2.0",
-    "grunt": "^1.4.0",
-    "grunt-contrib-copy": "^1.0.0",
+    "grunt": "1.4.0",
+    "grunt-contrib-copy": "1.0.0",
     "moment": "2.29.1",
     "node-sass": "4.13.1",
     "npm-run-all": "4.0.2",
diff --git a/templates/field/field--media--oe-media-iframe--iframe--oe-theme-main-content.html.twig b/templates/field/field--media--oe-media-iframe--iframe--oe-theme-main-content.html.twig
index 6a94ddee8..521dd9012 100644
--- a/templates/field/field--media--oe-media-iframe--iframe--oe-theme-main-content.html.twig
+++ b/templates/field/field--media--oe-media-iframe--iframe--oe-theme-main-content.html.twig
@@ -8,6 +8,5 @@
   {% include '@ecl-twig/media-container' with {
     'embedded_media': item.content,
     'ratio': ratio,
-    'extra_classes': (ratio == 'custom') ? 'ecl-media-container--custom-ratio' : '',
   } %}
 {% endfor %}
diff --git a/templates/paragraphs/paragraph--oe-iframe-media.html.twig b/templates/paragraphs/paragraph--oe-iframe-media.html.twig
index 0c2f2bff3..9c5f3e596 100644
--- a/templates/paragraphs/paragraph--oe-iframe-media.html.twig
+++ b/templates/paragraphs/paragraph--oe-iframe-media.html.twig
@@ -13,10 +13,6 @@
   {% set extra_classes = ['ecl-media-container--fullwidth'] %}
 {% endif %}
 
-{% if ratio == 'custom' %}
-  {% set extra_classes = extra_classes|merge(['ecl-media-container--custom-ratio']) %}
-{% endif %}
-
 {% if not paragraph.field_oe_title.isEmpty() %}
   <h2 class="ecl-u-type-heading-2">{{ content.field_oe_title }}</h2>
 {% endif %}
diff --git a/tests/src/Kernel/MediaRenderTest.php b/tests/src/Kernel/MediaRenderTest.php
index ac2dd13fa..5b95e4f1f 100644
--- a/tests/src/Kernel/MediaRenderTest.php
+++ b/tests/src/Kernel/MediaRenderTest.php
@@ -330,7 +330,7 @@ public function testIframeMedia(): void {
     $build = $this->mediaViewBuilder->view($media, 'oe_theme_main_content');
     $html = $this->renderRoot($build);
     $crawler = new Crawler($html);
-    $iframe = $crawler->filter('.ecl-media-container .ecl-media-container__media--ratio-custom iframe');
+    $iframe = $crawler->filter('.ecl-media-container iframe');
     $this->assertEquals('http://example.com/iframe_media', $iframe->attr('src'));
 
     // Assert iframe media with aspect ratio 3:2.
diff --git a/tests/src/Kernel/Paragraphs/MediaParagraphsTest.php b/tests/src/Kernel/Paragraphs/MediaParagraphsTest.php
index be33b56d6..45174f0e9 100644
--- a/tests/src/Kernel/Paragraphs/MediaParagraphsTest.php
+++ b/tests/src/Kernel/Paragraphs/MediaParagraphsTest.php
@@ -891,7 +891,7 @@ public function testIframe(): void {
     $this->container->get('entity_type.manager')->getAccessControlHandler('media')->resetCache();
     $html = $this->renderParagraph($paragraph);
     $crawler = new Crawler($html);
-    $iframe = $crawler->filter('figure.ecl-media-container.ecl-media-container--custom-ratio div.ecl-media-container__media.ecl-media-container__media--ratio-custom iframe');
+    $iframe = $crawler->filter('figure.ecl-media-container div.ecl-media-container__media iframe');
     $this->assertStringContainsString('http://example.com/iframe', $iframe->attr('src'));
     $this->assertStringNotContainsString('ecl-u-type-heading-2', $html);
 
@@ -899,7 +899,7 @@ public function testIframe(): void {
     $paragraph->set('field_oe_iframe_media_full_width', TRUE)->save();
     $html = $this->renderParagraph($paragraph);
     $crawler = new Crawler($html);
-    $iframe = $crawler->filter('figure.ecl-media-container.ecl-media-container--fullwidth.ecl-media-container--custom-ratio div.ecl-media-container__media.ecl-media-container__media--ratio-custom iframe');
+    $iframe = $crawler->filter('figure.ecl-media-container.ecl-media-container--fullwidth div.ecl-media-container__media iframe');
     $this->assertStringContainsString('http://example.com/iframe', $iframe->attr('src'));
 
     // Assert ratio.