diff --git a/docs/edit.js b/docs/edit.js
index 71f432f..6a504a1 100644
--- a/docs/edit.js
+++ b/docs/edit.js
@@ -265,7 +265,7 @@ function updateLink(url, title, push) {
 
 function makeQRCode() {
   var url =
-    "https://zxing.org/w/chart?cht=qr&chs=548x548&chld=L|1&choe=UTF-8&chl=" +
+    "https://chart.googleapis.com/chart?cht=qr&chs=512x512&chld=L|1&choe=UTF-8&chl=" +
     encodeURIComponent(location.href);
   this.href = url;
 }
diff --git a/docs/index.js b/docs/index.js
index c4d21ff..5059031 100644
--- a/docs/index.js
+++ b/docs/index.js
@@ -85,7 +85,7 @@
 
     if (fragment.startsWith("data:")) {
       let info = bitty.infoForDataURL(fragment);
-      const renderer = info.params?.render || renderers[info.mediatype].script;
+      const renderer = info.params?.render || renderers[info.mediatype]?.script;
       
       if (info.mediatype == "text/html") {
         dataPrefix = HEAD_TAGS;
diff --git a/docs/v1/edit.js b/docs/v1/edit.js
index e0e48b1..c1d5262 100644
--- a/docs/v1/edit.js
+++ b/docs/v1/edit.js
@@ -255,7 +255,7 @@ function updateLink(url, title, push) {
 
 function makeQRCode() {
   var url =
-    "https://zxing.org/w/chart?cht=qr&chs=548x548&chld=L|1&choe=UTF-8&chl=" +
+    "https://chart.googleapis.com/chart?cht=qr&chs=512x512&chld=L|1&choe=UTF-8&chl=" +
     encodeURIComponent(location.href);
   this.href = url;
 }