diff --git a/includes/DefaultSettings.php b/includes/DefaultSettings.php
index 8f36ab61c6..76ef207b97 100644
--- a/includes/DefaultSettings.php
+++ b/includes/DefaultSettings.php
@@ -20,7 +20,7 @@
 $wgBaseMwEmbedPath = realpath( dirname( __FILE__ ) . '/../' );
 
 // The version of the library:
-$wgMwEmbedVersion = '2.90';
+$wgMwEmbedVersion = '2.91.rc1';
 
 // Default HTTP protocol from GET or SERVER parameters
 if( isset($_GET['protocol']) ) {