diff --git a/src/platform/markdown.ts b/src/platform/markdown.ts
index 0bfba258..3eafe7d2 100644
--- a/src/platform/markdown.ts
+++ b/src/platform/markdown.ts
@@ -9,8 +9,7 @@ class MarkdownPlatform implements Platform {
 
   constructor(mainElement:HTMLElement) {
     this.mainElement = mainElement;
-    this.iframe = $('<iframe sandbox seamless src="javascript:void(0);" width="100%" height="100%"/>').appendTo(mainElement)[0] as HTMLIFrameElement;
-    //this.iframe = $('<iframe sandbox src="res/markdown-iframe.html" width="100%" height="100%"/>').appendTo(mainElement)[0] as HTMLIFrameElement;
+    this.iframe = $('<iframe sandbox="allow-same-origin" width="100%" height="100%"/>').appendTo(mainElement)[0] as HTMLIFrameElement;
     this.iframe.style.backgroundColor = 'white';
     mainElement.classList.add("vertical-scroll"); //100% height
     mainElement.style.overflowY = 'auto';
@@ -24,14 +23,7 @@ class MarkdownPlatform implements Platform {
   resume() {
   }
   loadROM(title, data:string) {
-    // have to do this b/c sandboxed without same origin
-    // TODO: preserve scroll position
-    if (this.iframe.srcdoc)
-      this.iframe.srcdoc = data;
-    else
-      this.iframe.src = "data:text/html;charset=utf-8," + escape(data);
-    //this.iframe.contentWindow.postMessage({body:data}, "*");
-    //$(this.iframe).contents().find('body').html(data);
+    $(this.iframe).contents().find('body').html(data);
   }
   isRunning() {
     return false;