diff --git a/requirements.txt b/requirements.txt
index c5ac5ae..c274097 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -6,7 +6,7 @@ backports-abc==0.5
 backports.functools-lru-cache==1.5
 backports.shutil-get-terminal-size==1.0.0
 backports.shutil-which==3.5.1
-bleach==2.1.3
+bleach==3.1.4
 cachetools==2.1.0
 certifi==2018.4.16
 cftime==1.0.0