diff --git a/core/requirements.txt b/core/requirements.txt
old mode 100755
new mode 100644
index 161c9cf..c007c89
--- a/core/requirements.txt
+++ b/core/requirements.txt
@@ -87,7 +87,7 @@ pytest-metadata==1.7.0
 python-dateutil==2.7.5
 python-editor==1.0.4
 pytz==2018.7
-PyYAML==3.13
+PyYAML==5.4
 redis==3.2.1
 requests==2.21.0
 rfc3986==1.3.2