diff --git a/requirements.txt b/requirements.txt
index dc4a920..4633a9d 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -30,7 +30,7 @@ PyJWT==1.5.3
 pymongo==3.5.1
 python-dateutil==2.6.1
 pytz==2017.3
-PyYAML==3.12
+PyYAML==5.4
 requests==2.18.4
 requests-oauthlib==0.8.0
 rsa==3.4.2