diff --git a/requirements.txt b/requirements.txt
index e672f32..4ef22b5 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -2,7 +2,7 @@ absl-py==0.8.1
 astor==0.8.1
 attrs==19.3.0
 backcall==0.1.0
-bleach==3.1.0
+bleach==3.3.0
 cachetools==3.1.1
 certifi==2019.11.28
 chainer==7.0.0