diff --git a/hands-on-ml-with-sklearn-and-tf/handson-ml-master/requirements.txt b/hands-on-ml-with-sklearn-and-tf/handson-ml-master/requirements.txt
index 69bf446..766e196 100644
--- a/hands-on-ml-with-sklearn-and-tf/handson-ml-master/requirements.txt
+++ b/hands-on-ml-with-sklearn-and-tf/handson-ml-master/requirements.txt
@@ -50,7 +50,7 @@ tensorflow==1.8.0
 
 # Forcing bleach to 1.5 to avoid version incompatibility when installing
 # TensorBoard.
-bleach==1.5.0
+bleach==3.1.4
 
 Keras==2.1.6