diff --git a/requirements.txt b/requirements.txt
index a356194..3dbca6a 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -37,7 +37,7 @@ pycparser==2.18
 PyJWT==1.6.4
 pymongo==3.7.1
 pytz==2018.5
-PyYAML==3.13
+PyYAML==5.4
 recommonmark==0.4.0
 requests==2.19.1
 sets==0.3.2