diff --git a/Activity01/requirements.txt b/Activity01/requirements.txt
index fea4f34..7bb9286 100644
--- a/Activity01/requirements.txt
+++ b/Activity01/requirements.txt
@@ -26,7 +26,7 @@ pandas==0.25.3
 protobuf
 python-dateutil==2.6.1
 pytz==2017.3
-PyYAML==3.12
+PyYAML==5.4
 redis==2.10.6
 rednose==1.2.3
 requests