diff --git a/requirements.txt b/requirements.txt
old mode 100755
new mode 100644
index 85cce76b..d03f8dd8
--- a/requirements.txt
+++ b/requirements.txt
@@ -4,7 +4,7 @@ Mako==1.0.0
 MarkupSafe==0.23
 Pillow==2.5.1
 Python-Chart==1.39
-PyYAML==3.11
+PyYAML==5.1
 Werkzeug==0.9.6
 argparse==1.2.1
 decorator==3.4.0