diff --git a/requirements.txt b/requirements.txt
index 4d1cafb..b9ae971 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -7,7 +7,7 @@ Automat==0.6.0
 backcall==0.1.0
 bio==0.1.0
 biopython==1.73
-bleach==1.5.0
+bleach==3.3.0
 blessings==1.7
 blinker==1.4
 certifi==2018.1.18