diff --git a/pilbox/image.py b/pilbox/image.py
index f4ae69c..c23ff54 100644
--- a/pilbox/image.py
+++ b/pilbox/image.py
@@ -518,7 +518,10 @@ def main():
                         quality=options.quality,
                         progressive=options.progressive,
                         preserve_exif=options.preserve_exif)
-    sys.stdout.write(stream.read())
+    try:
+        sys.stdout.buffer.write(stream.read())
+    except AttributeError:
+        sys.stdout.write(stream.read())
     stream.close()