diff --git a/requirements.txt b/requirements.txt
index 42bdbfe..3135eef 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -8,7 +8,7 @@ awscli==1.16.165
 backcall==0.1.0
 beautifulsoup4==4.7.1
 bioc==1.1.dev3
-bleach==2.1.3
+bleach==3.3.0
 blis==0.2.4
 boto==2.49.0
 boto3==1.9.159