diff --git a/requirements.txt b/requirements.txt
index 1ec17a7..946a559 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -8,7 +8,7 @@ idna==2.6
 imagesize==0.7.1
 Jinja2==2.10
 magicblue==0.5.0
-MarkupSafe==1.0
+MarkupSafe==1.1.1
 Pygments==2.2.0
 pytz==2017.3
 requests==2.18.4