diff --git a/machine-learning/requirements.txt b/machine-learning/requirements.txt
index c46b507..d894b14 100644
--- a/machine-learning/requirements.txt
+++ b/machine-learning/requirements.txt
@@ -1,7 +1,7 @@
 absl-py==0.1.10
 args==0.1.0
 astroid==1.6.1
-bleach==1.5.0
+bleach==3.1.2
 certifi==2018.1.18
 chardet==3.0.4
 click==6.7