diff --git a/jupyter_demo/requirements.txt b/jupyter_demo/requirements.txt
index d1f0d1e..cf055a5 100644
--- a/jupyter_demo/requirements.txt
+++ b/jupyter_demo/requirements.txt
@@ -1,5 +1,5 @@
 backcall==0.1.0
-bleach==3.0.2
+bleach==3.3.0
 certifi==2018.11.29
 chardet==3.0.4
 decorator==4.3.0