diff --git a/requirements.txt b/requirements.txt
index 735476e..3066633 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -17,7 +17,7 @@ pydot==1.4.1
 pyparsing==2.4.0
 python-dateutil==2.8.0
 pytz==2019.1
-PyYAML==5.1
+PyYAML==5.4
 scipy==1.2.1
 six==1.12.0
 tornado==6.0.2
\ No newline at end of file