diff --git a/jupyter_container/requirements.txt b/jupyter_container/requirements.txt
index 1c16c19..32590c9 100644
--- a/jupyter_container/requirements.txt
+++ b/jupyter_container/requirements.txt
@@ -4,7 +4,7 @@ async-generator==1.10
 attrs==20.3.0
 Babel==2.9.0
 backcall==0.2.0
-bleach==3.2.2
+bleach==3.3.0
 Brotli==1.0.9
 certifi==2020.12.5
 cffi==1.14.4