diff --git a/core/modules/responsive_image/responsive_image.install b/core/modules/responsive_image/responsive_image.install
new file mode 100644
index 0000000..1a64048
--- /dev/null
+++ b/core/modules/responsive_image/responsive_image.install
@@ -0,0 +1,27 @@
+<?php
+/**
+ * @file
+ * Install, update and uninstall functions for the responsive image module.
+ */
+
+/**
+ * Add allowed attributes to existing html filters.
+ */
+function responsive_image_update_8001() {
+  $config_factory = \Drupal::configFactory();
+  foreach ($config_factory->listAll('filter.format') as $name) {
+    $config = $config_factory->getEditable($name);
+    if (!$config->get('filters.filter_responsive_image_style.status')) {
+      continue;
+    }
+    $allowed_html = $config->get('filters.filter_html.settings.allowed_html');
+    $matches = [];
+    if (!empty($allowed_html) && preg_match('/<img([^>]*)>/', $allowed_html, $matches)) {
+      $new_attributes = array_filter(explode(' ', $matches[1]));
+      $new_attributes[] = 'data-responsive-image-style';
+      $allowed_html = preg_replace('/<img([^>]*)>/', '<img ' . implode(' ', array_unique($new_attributes)) . '>', $allowed_html);
+      $config->set('filters.filter_html.settings.allowed_html', $allowed_html);
+      $config->save();
+    }
+  }
+}
diff --git a/core/modules/system/system.install b/core/modules/system/system.install
index 47f6dca..94f27cd 100644
--- a/core/modules/system/system.install
+++ b/core/modules/system/system.install
@@ -1808,5 +1808,27 @@ function system_update_8011() {
 }
 
 /**
+ * Add allowed attributes to existing html filters.
+ */
+function system_update_8012() {
+  $config_factory = \Drupal::configFactory();
+  foreach ($config_factory->listAll('filter.format') as $name) {
+    $config = $config_factory->getEditable($name);
+    if (!$config->get('filters.filter_imagestyle.status')) {
+      continue;
+    }
+    $allowed_html = $config->get('filters.filter_html.settings.allowed_html');
+    $matches = [];
+    if (!empty($allowed_html) && preg_match('/<img([^>]*)>/', $allowed_html, $matches)) {
+      $new_attributes = array_filter(explode(' ', $matches[1]));
+      $new_attributes[] = 'data-image-style';
+      $allowed_html = preg_replace('/<img([^>]*)>/', '<img ' . implode(' ', array_unique($new_attributes)) . '>', $allowed_html);
+      $config->set('filters.filter_html.settings.allowed_html', $allowed_html);
+      $config->save();
+    }
+  }
+}
+
+/**
  * @} End of "addtogroup updates-8.0.0-beta".
  */
diff --git a/core/profiles/standard/config/install/filter.format.basic_html.yml b/core/profiles/standard/config/install/filter.format.basic_html.yml
index 92224c2..f35869c 100644
--- a/core/profiles/standard/config/install/filter.format.basic_html.yml
+++ b/core/profiles/standard/config/install/filter.format.basic_html.yml
@@ -15,9 +15,15 @@ filters:
     status: true
     weight: -10
     settings:
-      allowed_html: '<a href hreflang> <em> <strong> <cite> <blockquote cite> <code> <ul type> <ol start type> <li> <dl> <dt> <dd> <h2 id> <h3 id> <h4 id> <h5 id> <h6 id> <p> <br> <span> <img src alt height width data-entity-type data-entity-uuid data-align data-caption>'
+      allowed_html: '<a href hreflang> <em> <strong> <cite> <blockquote cite> <code> <ul type> <ol start type> <li> <dl> <dt> <dd> <h2 id> <h3 id> <h4 id> <h5 id> <h6 id> <p> <br> <span> <img src alt height width data-entity-type data-entity-uuid data-align data-caption data-image-style>'
       filter_html_help: false
       filter_html_nofollow: false
+  filter_imagestyle:
+    id: filter_imagestyle
+    provider: image
+    status: true
+    weight: 6
+    settings: {  }
   filter_align:
     id: filter_align
     provider: filter