diff --git a/requirements.txt b/requirements.txt
index 34d770b5b..ae5837b8f 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,4 +1,4 @@
 Flask==0.10.1
-PyYAML==3.11
+PyYAML==5.4
 python-http-client==2.2.1
 six==1.10.0