diff --git a/reveal/reveal.d.ts b/reveal/reveal.d.ts
index f69ac315c7..e99fb44add 100644
--- a/reveal/reveal.d.ts
+++ b/reveal/reveal.d.ts
@@ -61,6 +61,9 @@ interface RevealStatic {
     getQueryHash():any;
     setState(state:any):void;
     getState():any;
+
+    // update slides after dynamic changes
+    sync():void;
 }
 
 interface RevealOptions {