diff --git a/requirements.txt b/requirements.txt
old mode 100755
new mode 100644
index 319f5a3..c0a24bb
--- a/requirements.txt
+++ b/requirements.txt
@@ -202,7 +202,7 @@ python-dateutil==2.7.5
 python-utils==2.3.0
 pytz==2018.7
 PyWavelets==1.0.1
-PyYAML==3.13
+PyYAML==5.4
 pyzmq==17.1.2
 qtconsole==4.4.3
 queuelib==1.5.0