diff --git a/desktop/sources/scripts/library.js b/desktop/sources/scripts/library.js
index 5b43e57..95e4f25 100644
--- a/desktop/sources/scripts/library.js
+++ b/desktop/sources/scripts/library.js
@@ -7,7 +7,7 @@ function Library (ronin) {
 
   this.export = (path, format = 'image/png', quality = 1.0) => { // Exports a graphic file with format.
     if (!path) { console.warn('Missing export path'); return path }
-    const dataUrl = ronin.surface.el.toDataURL(format, quality)
+    const dataUrl = ronin.surface.el.toDataURL(path.indexOf('.jpg') > -1 ? 'image/jpeg' : path.indexOf('.png') > -1 ? 'image/png' : format, quality)
     const data = dataUrl.replace(/^data:image\/png;base64,/, '').replace(/^data:image\/jpeg;base64,/, '')
     fs.writeFileSync(path, data, 'base64')
     return path