diff --git a/pythoncourse/installation/requirements_azure.txt b/pythoncourse/installation/requirements_azure.txt
index 81c8ccf..99a35e6 100644
--- a/pythoncourse/installation/requirements_azure.txt
+++ b/pythoncourse/installation/requirements_azure.txt
@@ -140,7 +140,7 @@ billiard==3.6.2.0
 bitarray==0.8.3
 bkcharts==0.2
 blaze==0.11.3
-bleach==1.5.0
+bleach==3.1.4
 blis==0.4.1
 bokeh==0.13.0
 boto==2.49.0