diff --git a/src/pretix/base/templatetags/rich_text.py b/src/pretix/base/templatetags/rich_text.py
index 70ba6e6a6..c4a8a53d7 100644
--- a/src/pretix/base/templatetags/rich_text.py
+++ b/src/pretix/base/templatetags/rich_text.py
@@ -96,6 +96,7 @@ ALLOWED_ATTRIBUTES = {
     'div': ['class'],
     'p': ['class'],
     'span': ['class', 'title'],
+    'ol': ['start'],
     # Update doc/user/markdown.rst if you change this!
 }