diff --git a/src/templates.js b/src/templates.js
index f60787f..bb13cae 100644
--- a/src/templates.js
+++ b/src/templates.js
@@ -184,10 +184,11 @@ function svg(data="", script="", dependency_url="") {
     <meta charset="utf-8">
     <style type="text/css">
       body {
+        min-height: 100%;
         margin: 0;
         padding: 0;
       }
-      canvas {
+      svg {
         padding: 0;
         margin: auto;
         display: block;