diff --git a/luigi/requirements.txt b/luigi/requirements.txt
old mode 100755
new mode 100644
index 74dca85..2720a70
--- a/luigi/requirements.txt
+++ b/luigi/requirements.txt
@@ -1,6 +1,6 @@
 appdirs==1.4.3
 asn1crypto==0.24.0
-bleach==1.5.0
+bleach==3.3.0
 Brlapi==0.6.6
 certifi==2017.11.5
 chardet==3.0.4