diff --git a/Lecture5/requirements.txt b/Lecture5/requirements.txt
index 70bab6d..c32a452 100644
--- a/Lecture5/requirements.txt
+++ b/Lecture5/requirements.txt
@@ -1,6 +1,6 @@
 attrs==19.3.0
 backcall==0.1.0
-bleach==3.1.0
+bleach==3.1.4
 certifi==2019.11.28
 cycler==0.10.0
 decorator==4.4.1