diff --git a/requirements.txt b/requirements.txt
index 2eea988..4ae6475 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -9,7 +9,7 @@ idna==3.10
 itsdangerous==2.2.0
 Jinja2==3.1.6
 lxml==5.3.0
-MarkupSafe==2.1.5
+MarkupSafe==3.0.3
 python-dateutil==2.9.0.post0
 pytz==2025.2
 recurring-ical-events==3.3.2