diff --git a/day2/docker/requirements.txt b/day2/docker/requirements.txt
index ea93cf7..aa83ba3 100644
--- a/day2/docker/requirements.txt
+++ b/day2/docker/requirements.txt
@@ -25,7 +25,7 @@ pyserial-asyncio==0.4
 pysha3==1.0.2
 python-dateutil==2.8.0
 pytz==2018.9
-PyYAML==5.1
+PyYAML==5.4
 regex==2019.3.12
 requests==2.21.0
 six==1.12.0