diff --git a/wordcloud_demo/requirements.txt b/wordcloud_demo/requirements.txt
index 8bc10c9..533f6c4 100644
--- a/wordcloud_demo/requirements.txt
+++ b/wordcloud_demo/requirements.txt
@@ -2,7 +2,7 @@ alabaster==0.7.10
 astroid==1.5.3
 attrs==17.3.0
 Babel==2.5.1
-bleach==2.1.2
+bleach==3.1.4
 certifi==2017.11.5
 chardet==3.0.4
 click==6.7