diff --git a/requirements.txt b/requirements.txt
old mode 100755
new mode 100644
index 06db582f..648604ff
--- a/requirements.txt
+++ b/requirements.txt
@@ -6,7 +6,7 @@ backcall==0.1.0
 bcrypt==3.1.4
 beautifulsoup4==4.6.0
 billiard==3.5.0.3
-bleach==2.1.3
+bleach==3.1.1
 bokeh==0.12.15
 cairocffi==0.8.1
 CairoSVG==2.1.3