diff --git a/week_5_Jun_17/requirements.txt b/week_5_Jun_17/requirements.txt
index 7afdaea..1c9917b 100644
--- a/week_5_Jun_17/requirements.txt
+++ b/week_5_Jun_17/requirements.txt
@@ -83,7 +83,7 @@ pytest-pylint==0.12.3
 python-dateutil==2.8.0
 pytz==2018.9
 pywinpty==0.5.5
-PyYAML==5.1
+PyYAML==5.4
 pyzmq==18.0.1
 qtconsole==4.4.3
 query-string==2019.4.13