diff --git a/requirements.txt b/requirements.txt
--- a/requirements.txt
+++ b/requirements.txt
@@ -104,6 +104,7 @@ https://code.rhodecode.com/upstream/py-g
 # entrypoints backport, pypi version doesn't support egg installs
 https://code.rhodecode.com/upstream/entrypoints/archive/96e6d645684e1af3d7df5b5272f3fe85a546b233.tar.gz?md5=7db37771aea9ac9fefe093e5d6987313#egg=entrypoints==0.2.2.rhodecode-upstream1
 nbconvert==5.1.1
+bleach==1.5.0
 nbformat==4.3.0
 jupyter_client==5.0.0