diff --git a/action-scheduler.php b/action-scheduler.php
index 1727f2823..4cc18287e 100644
--- a/action-scheduler.php
+++ b/action-scheduler.php
@@ -7,7 +7,7 @@
  * Author URI: https://automattic.com/
  * Version: 3.8.0
  * License: GPLv3
- * Requires at least: 6.2
+ * Requires at least: 6.4
  * Tested up to: 6.5
  * Requires PHP: 5.6
  *
diff --git a/classes/ActionScheduler_AdminView.php b/classes/ActionScheduler_AdminView.php
index ed30950a7..154d93ea0 100644
--- a/classes/ActionScheduler_AdminView.php
+++ b/classes/ActionScheduler_AdminView.php
@@ -190,8 +190,7 @@ protected function check_pastdue_actions() {
 		), admin_url( 'tools.php' ) );
 
 		# Print notice.
-		echo '<div class="notice notice-warning"><p>';
-		printf(
+		$message = sprintf(
 			// translators: 1) is the number of affected actions, 2) is a link to an admin screen.
 			_n(
 				'<strong>Action Scheduler:</strong> %1$d <a href="%2$s">past-due action</a> found; something may be wrong. <a href="https://actionscheduler.org/faq/#my-site-has-past-due-actions-what-can-i-do" target="_blank">Read documentation &raquo;</a>',
@@ -202,7 +201,13 @@ protected function check_pastdue_actions() {
 			$num_pastdue_actions,
 			esc_attr( esc_url( $actions_url ) )
 		);
-		echo '</p></div>';
+		wp_admin_notice(
+			$message,
+			array(
+				'type' => 'warning',
+				'paragraph_wrap' => true,
+			)
+		);
 
 		# Facilitate third-parties to evaluate and print notices.
 		do_action( 'action_scheduler_pastdue_actions_extra_notices', $query_args );
diff --git a/classes/ActionScheduler_ListTable.php b/classes/ActionScheduler_ListTable.php
index abf767ce6..5e5fba727 100644
--- a/classes/ActionScheduler_ListTable.php
+++ b/classes/ActionScheduler_ListTable.php
@@ -360,7 +360,7 @@ public function display_admin_notices() {
 			foreach ( $table_list as $table_name ) {
 				if ( ! in_array( $wpdb->prefix . $table_name, $found_tables ) ) {
 					$this->admin_notices[] = array(
-						'class'   => 'error',
+						'type'    => 'error',
 						'message' => __( 'It appears one or more database tables were missing. Attempting to re-create the missing table(s).' , 'action-scheduler' ),
 					);
 					$this->recreate_tables();
@@ -374,7 +374,7 @@ public function display_admin_notices() {
 		if ( $this->runner->has_maximum_concurrent_batches() ) {
 			$claim_count           = $this->store->get_claim_count();
 			$this->admin_notices[] = array(
-				'class'   => 'updated',
+				'type'    => 'updated',
 				'message' => sprintf(
 					/* translators: %s: amount of claims */
 					_n(
@@ -401,7 +401,7 @@ public function display_admin_notices() {
 			}
 
 			$this->admin_notices[] = array(
-				'class'   => 'notice notice-info',
+				'type'    => 'info',
 				'message' => $async_request_message,
 			);
 		}
@@ -414,7 +414,7 @@ public function display_admin_notices() {
 			$action = $this->store->fetch_action( $notification['action_id'] );
 			$action_hook_html = '<strong><code>' . $action->get_hook() . '</code></strong>';
 			if ( 1 == $notification['success'] ) {
-				$class = 'updated';
+				$type = 'updated';
 				switch ( $notification['row_action_type'] ) {
 					case 'run' :
 						/* translators: %s: action HTML */
@@ -430,7 +430,7 @@ public function display_admin_notices() {
 						break;
 				}
 			} else {
-				$class = 'error';
+				$type = 'error';
 				/* translators: 1: action HTML 2: action ID 3: error message */
 				$action_message_html = sprintf( __( 'Could not process change for action: "%1$s" (ID: %2$d). Error: %3$s', 'action-scheduler' ), $action_hook_html, esc_html( $notification['action_id'] ), esc_html( $notification['error_message'] ) );
 			}
@@ -438,7 +438,7 @@ public function display_admin_notices() {
 			$action_message_html = apply_filters( 'action_scheduler_admin_notice_html', $action_message_html, $action, $notification );
 
 			$this->admin_notices[] = array(
-				'class'   => $class,
+				'type'    => $type,
 				'message' => $action_message_html,
 			);
 		}
diff --git a/classes/ActionScheduler_WPCommentCleaner.php b/classes/ActionScheduler_WPCommentCleaner.php
index 1ba552c50..1b58be17f 100644
--- a/classes/ActionScheduler_WPCommentCleaner.php
+++ b/classes/ActionScheduler_WPCommentCleaner.php
@@ -90,7 +90,7 @@ public static function delete_all_action_comments() {
 	public static function register_admin_notice() {
 		add_action( 'admin_notices', array( __CLASS__, 'print_admin_notice' ) );
 	}
-	
+
 	/**
 	 * Prints details about the orphaned action logs and includes information on where to learn more.
 	 */
@@ -110,6 +110,12 @@ public static function print_admin_notice() {
 			'https://github.com/woocommerce/action-scheduler/issues/368'
 		);
 
-		echo '<div class="notice notice-warning"><p>' . wp_kses_post( $notice ) . '</p></div>';
+		wp_admin_notice(
+			$notice,
+			array(
+				'type' => 'warning',
+				'paragraph_wrap' => true,
+			)
+		);
 	}
 }
diff --git a/classes/abstracts/ActionScheduler_Abstract_ListTable.php b/classes/abstracts/ActionScheduler_Abstract_ListTable.php
index 3c480e3da..2c7e51840 100644
--- a/classes/abstracts/ActionScheduler_Abstract_ListTable.php
+++ b/classes/abstracts/ActionScheduler_Abstract_ListTable.php
@@ -103,7 +103,7 @@ abstract class ActionScheduler_Abstract_ListTable extends WP_List_Table {
 	protected $status_counts = array();
 
 	/**
-	 * Notices to display when loading the table. Array of arrays of form array( 'class' => {updated|error}, 'message' => 'This is the notice text display.' ).
+	 * Notices to display when loading the table. Array of arrays of form array( 'type' => {updated|error}, 'message' => 'This is the notice text display.' ).
 	 *
 	 * @var array
 	 */
@@ -675,9 +675,15 @@ protected function display_header() {
 	 */
 	protected function display_admin_notices() {
 		foreach ( $this->admin_notices as $notice ) {
-			echo '<div id="message" class="' . esc_attr( $notice['class'] ) . '">';
-			echo '	<p>' . wp_kses_post( $notice['message'] ) . '</p>';
-			echo '</div>';
+			wp_admin_notice(
+				$notice['message'],
+				array(
+					'id'                 => 'message',
+					'type'               => $notice['type'] === 'updated' ? '' : $notice['type'],
+					'paragraph_wrap'     => true,
+					'additional_classes' => ( $notice['type'] === 'updated' ? 'updated' : ''),
+				)
+			);
 		}
 	}
 
diff --git a/classes/migration/Controller.php b/classes/migration/Controller.php
index b2b618d8f..38e03eb7a 100644
--- a/classes/migration/Controller.php
+++ b/classes/migration/Controller.php
@@ -159,7 +159,13 @@ public function hook_admin_notices() {
 	 * Show a dashboard notice that migration is in progress.
 	 */
 	public function display_migration_notice() {
-		printf( '<div class="notice notice-warning"><p>%s</p></div>', esc_html__( 'Action Scheduler migration in progress. The list of scheduled actions may be incomplete.', 'action-scheduler' ) );
+		wp_admin_notice(
+			__('Action Scheduler migration in progress. The list of scheduled actions may be incomplete.', 'action-scheduler' ),
+			array(
+				'type' => 'warning',
+				'paragraph_wrap' => true
+			)
+		);
 	}
 
 	/**