diff --git a/requirements.txt b/requirements.txt
index e383e0c..df2774d 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -34,7 +34,7 @@ pyglet==1.3.2
 Pygments==2.4.1
 pyparsing==2.4.0
 python-dateutil==2.8.0
-PyYAML==5.1.1
+PyYAML==5.4
 scipy==1.3.0
 six==1.12.0
 tb-nightly==1.14.0a20190603