diff --git a/requirements.txt b/requirements.txt
index f0102c2..a7c7ae3 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -52,7 +52,7 @@ itsdangerous==2.1.2
 Jinja2==3.1.2
 jsonschema==4.17.3
 lxml==4.9.2
-MarkupSafe==2.1.2
+MarkupSafe==2.1.3
 mf2py==1.1.2
 mf2util==0.5.2
 mox3==1.1.0