diff --git a/thumbor_rekognition/__init__.py b/thumbor_rekognition/__init__.py
index b77edeb..4345c77 100644
--- a/thumbor_rekognition/__init__.py
+++ b/thumbor_rekognition/__init__.py
@@ -42,7 +42,7 @@ def read_jpeg_bytes(self):
         """
 
         bio = BytesIO()
-        self.context.modules.engine.image.save(bio, 'JPEG')
+        self.context.modules.engine.image.convert('RGB').save(bio, 'JPEG')
         return bio.getvalue()
 
     def size(self):