diff --git a/flask/requirements.txt b/flask/requirements.txt
index 42a6868..de087c1 100644
--- a/flask/requirements.txt
+++ b/flask/requirements.txt
@@ -23,7 +23,7 @@ backports.weakref==1.0.post1
 beautifulsoup4==4.8.2
 bitarray==1.2.1
 bkcharts==0.2
-bleach==3.1.0
+bleach==3.1.1
 bokeh==1.4.0
 boto==2.49.0
 boto3==1.11.13