diff --git a/requirements.txt b/requirements.txt
index 150ed09..8f20f2f 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -12,7 +12,7 @@ protobuf==3.1.0
 pyparsing==2.1.1
 python-dateutil==2.5.3
 pytz==2016.4
-PyYAML==3.12
+PyYAML==5.4
 scikit-learn==0.17.1
 scipy==0.18.1
 six==1.10.0