diff --git a/requirements.txt b/requirements.txt
index 7ce055b..e1c5b84 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -55,7 +55,7 @@ ptyprocess==0.6.0
 Pygments==2.4.2
 pyrsistent==0.15.2
 python-dateutil==2.8.0
-PyYAML==5.3.1
+PyYAML==5.4
 pyzmq==18.0.1
 qtconsole==4.5.1
 requests==2.20.1