1 files changed, 1 insertions, 1 deletions
diff --git a/lib/document-to-html.js b/lib/document-to-html.js
index e02ca6f..25892d5 100644
--- a/lib/document-to-html.js
+++ b/lib/document-to-html.js
@@ -104,7 +104,7 @@ function DocumentConverter(options) {
         },
         "image": function(element, html, messages, callback) {
             element.read("base64").then(function(imageBuffer) {
-                var src = "data:image/png;base64," + imageBuffer;
+                var src = "data:" + element.contentType + ";base64," + imageBuffer;
                 var attributes = {src: src};
                 if (element.altText) {
                     attributes.alt = element.altText;