From 5cbcbe6d7efad6050e29d74b998bd84c60da66e6 Mon Sep 17 00:00:00 2001
From: Raphael Michel <mail@raphaelmichel.de>
Date: Wed, 21 Mar 2018 09:55:38 +0100
Subject: [PATCH] Thumbnail: Fix CMYK images

---
 src/pretix/helpers/thumb.py | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/src/pretix/helpers/thumb.py b/src/pretix/helpers/thumb.py
index 66c9553a1a..40e7042f03 100644
--- a/src/pretix/helpers/thumb.py
+++ b/src/pretix/helpers/thumb.py
@@ -58,6 +58,8 @@ def create_thumbnail(sourcename, size):
     checksum = hashlib.md5(image.tobytes()).hexdigest()
     name = checksum + '.' + size.replace('^', 'c') + '.png'
     buffer = BytesIO()
+    if image.mode not in ("1", "L", "RGB"):
+        image = image.convert('RGB')
     image.save(fp=buffer, format='PNG')
     imgfile = ContentFile(buffer.getvalue())