diff --git a/requirements.txt b/requirements.txt
old mode 100755
new mode 100644
index 2fda55c7..9f8c4261
--- a/requirements.txt
+++ b/requirements.txt
@@ -6,7 +6,7 @@ python-dateutil==2.5.3
 python-engineio==0.9.2
 python-mimeparse==1.5.2
 python-socketio==1.4.4
-PyYAML==4.2b1
+PyYAML==5.4
 requests==2.20.0
 Werkzeug==0.11.10
 httplib2==0.9.2