diff --git a/requirements.txt b/requirements.txt
index 2dd7e01..f561a0f 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -17,7 +17,7 @@ protobuf==3.6.1
 pyparsing==2.3.1
 python-dateutil==2.8.0
 pytz==2018.9
-PyYAML==4.2b1
+PyYAML==5.4
 scikit-learn==0.20.2
 scipy==1.2.0
 six==1.12.0