diff --git a/DDPG/requirements.txt b/DDPG/requirements.txt
index e21f072..225dbdf 100644
--- a/DDPG/requirements.txt
+++ b/DDPG/requirements.txt
@@ -62,7 +62,7 @@ pyrsistent==0.15.6
 python-dateutil==2.8.0
 python-utils==2.3.0
 pytz==2019.2
-PyYAML==5.3
+PyYAML==5.4
 requests==2.22.0
 requests-file==1.4.3
 retrying==1.3.3