diff --git a/container-optimizer/requirements.txt b/container-optimizer/requirements.txt
index 61c96cf..0f091b2 100644
--- a/container-optimizer/requirements.txt
+++ b/container-optimizer/requirements.txt
@@ -88,7 +88,7 @@ pyparsing==2.4.6
 pyrsistent==0.15.7
 python-dateutil==2.8.1
 pytz==2019.3
-PyYAML==5.3
+PyYAML==5.4
 pyzmq==19.0.0
 qtconsole==4.6.0
 requests==2.23.0