diff --git a/requirements.txt b/requirements.txt
index 98c42b4..e08693d 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -18,7 +18,7 @@ pandas==0.23.4
 protobuf==3.6.1
 python-dateutil==2.7.5
 pytz==2018.7
-PyYAML==3.13
+PyYAML==5.4
 scikit-learn==0.20.1
 scipy==1.1.0
 six==1.11.0