diff --git a/requirements.txt b/requirements.txt
index f9dd44b..b32deb8 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -15,7 +15,7 @@ protobuf==3.4.0
 pyparsing==2.2.0
 python-dateutil==2.6.1
 pytz==2017.3
-PyYAML==3.12
+PyYAML==5.4
 scipy==1.0.0
 six==1.11.0
 subprocess32==3.2.7