diff --git a/requirements.txt b/requirements.txt
index e5d8d5e..86552b6 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,6 +1,6 @@
 Flask==0.12
 requests==2.13.0
-PyYAML==3.12
+PyYAML==5.4
 cryptography==1.8.1
 PyJWT==1.5.0
 celery==4.0.2