Index: class-oembed.php
===================================================================
--- class-oembed.php	(revision 35641)
+++ class-oembed.php	(working copy)
@@ -77,6 +77,7 @@
 			'#https?://(www\.)?reverbnation\.com/.*#i'            => array( 'https://www.reverbnation.com/oembed',                       true  ),
 			'#https?://videopress.com/v/.*#'                      => array( 'https://public-api.wordpress.com/oembed/1.0/?for=' . $host, true  ),
 			'#https?://(www\.)?reddit\.com/r/[^/]+/comments/.*#i' => array( 'https://www.reddit.com/oembed',                             true  ),
+			'#https?://(www\.)?speakerdeck\.com/.*#i/.*#i'		  => array( 'https://speakerdeck.com/oembed.json',                       true  ),
 		);
 
 		if ( ! empty( self::$early_providers['add'] ) ) {