diff --git a/requirements-dev.txt b/requirements-dev.txt
index d345a41..6946e41 100644
--- a/requirements-dev.txt
+++ b/requirements-dev.txt
@@ -4,7 +4,7 @@ astroid==2.0.4
 atomicwrites==1.2.1
 attrs==18.2.0
 backcall==0.1.0
-bleach==3.0.2
+bleach==3.3.0
 bokeh==1.0.1
 boto==2.49.0
 boto3==1.9.42