diff --git a/pyproject.toml b/pyproject.toml
index 58b7f50018..288f08c76b 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -33,7 +33,7 @@ dependencies = [
   "celery==5.3.*",
   "chardet==5.2.*",
   "cryptography>=3.4.2",
-  "css-inline==0.8.*",
+  "css-inline==0.13.*",
   "defusedcsv>=1.1.0",
   "dj-static",
   "Django==4.2.*",
diff --git a/src/pretix/base/email.py b/src/pretix/base/email.py
index 60b888e858..137d3fb51a 100644
--- a/src/pretix/base/email.py
+++ b/src/pretix/base/email.py
@@ -189,7 +189,7 @@ class TemplateBasedMailRenderer(BaseHTMLMailRenderer):
         tpl = get_template(self.template_name)
         body_html = tpl.render(htmlctx)
 
-        inliner = css_inline.CSSInliner(remove_style_tags=True)
+        inliner = css_inline.CSSInliner(keep_style_tags=False)
         body_html = inliner.inline(body_html)
 
         return body_html
diff --git a/src/pretix/base/services/notifications.py b/src/pretix/base/services/notifications.py
index bc34ad3537..0680482f20 100644
--- a/src/pretix/base/services/notifications.py
+++ b/src/pretix/base/services/notifications.py
@@ -136,7 +136,7 @@ def send_notification_mail(notification: Notification, user: User):
     tpl_html = get_template('pretixbase/email/notification.html')
 
     body_html = tpl_html.render(ctx)
-    inliner = css_inline.CSSInliner(remove_style_tags=True)
+    inliner = css_inline.CSSInliner(keep_style_tags=False)
     body_html = inliner.inline(body_html)
 
     tpl_plain = get_template('pretixbase/email/notification.txt')