diff --git a/ChatModel/requirements.txt b/ChatModel/requirements.txt
index f4f22a0..35c9177 100644
--- a/ChatModel/requirements.txt
+++ b/ChatModel/requirements.txt
@@ -4,7 +4,7 @@ arrow==0.12.1
 astor==0.6.2
 Babel==2.5.3
 beautifulsoup4==4.6.0
-bleach==1.5.0
+bleach==3.1.4
 bs4==0.0.1
 certifi==2018.1.18
 chardet==3.0.4