diff --git a/requirements.txt b/requirements.txt
index 634189c..886243b 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -63,7 +63,7 @@ Pygments==2.4.2
 pyparsing==2.4.2
 pyrsistent==0.15.5
 python-dateutil==2.8.0
-PyYAML==5.1.2
+PyYAML==5.4
 pyzmq==18.1.0
 qtconsole==4.5.5
 requests==2.22.0