diff --git a/setup.py b/setup.py
old mode 100755
new mode 100644
index f17f16e..df4fccf
--- a/setup.py
+++ b/setup.py
@@ -20,5 +20,5 @@
               'nxted = nxted.nxted:main'
               ]     
       },
-      install_requires=['PyYAML==3.10', 'pgu==0.18']
+      install_requires=['PyYAML==5.4', 'pgu==0.18']
 )