diff --git a/requirements.txt b/requirements.txt
index 3b9ff76..59f15d8 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -25,7 +25,7 @@ inflection==0.3.1
 itypes==1.1.0
 Jinja2==2.10
 jsonpickle==0.9.5
-MarkupSafe==1.0
+MarkupSafe==3.0.1
 openapi-codec==1.3.2
 PyJWT==1.5.3
 pytz==2017.3