From ffae64dd78d6fa77c1209c783aeb28d14f1b1d40 Mon Sep 17 00:00:00 2001
From: Serge Koval <serge.koval@gmail.com>
Date: Wed, 16 Oct 2019 18:53:35 -0400
Subject: [PATCH] Fixed pillow image conversion

---
 flask_admin/form/upload.py | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/flask_admin/form/upload.py b/flask_admin/form/upload.py
index b58204647..4a950b6f1 100644
--- a/flask_admin/form/upload.py
+++ b/flask_admin/form/upload.py
@@ -465,7 +465,10 @@ def _resize(self, image, size):
         return image
 
     def _save_image(self, image, path, format='JPEG'):
-        if image.mode not in ('RGB', 'RGBA'):
+        # New Pillow versions require RGB format for JPEGs
+        if format == 'JPEG':
+            image = image.convert('RGB')
+        elif image.mode not in ('RGB', 'RGBA'):
             image = image.convert('RGBA')
 
         with open(path, 'wb') as fp: