diff --git a/requirements.txt b/requirements.txt
index 1a247fbc4..a62285a08 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -3,7 +3,7 @@
 colorama==0.3.7
 cssutils==1.0.2
 Jinja2==2.9.5
-MarkupSafe==0.23
+MarkupSafe==1.0
 Pygments==2.2.0
 pyPEG2==2.15.2
 PyYAML==3.12