diff --git a/requirements.txt b/requirements.txt
index 1ace7bd78..d9b37a1c1 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -43,7 +43,7 @@ pytest-watch==4.2.0
 python-dateutil==2.7.5
 python-jose[cryptography]==3.0.1
 pytz==2018.9
-PyYAML==3.13
+PyYAML==4.2b4
 raven==6.10.0
 requests==2.21.0
 rsa==4.0