diff --git a/setup.py b/setup.py
old mode 100755
new mode 100644
index 3badbbf..5ba2f55
--- a/setup.py
+++ b/setup.py
@@ -40,7 +40,7 @@ def run(self):
             'colorlog==2.6.0',
             'zest.releaser==6.4',
             'coverage==4.0.3',
-            'pyyaml==3.11',
+            'pyyaml==5.1',
             'pygments',
             'sphinx_bootstrap_theme'
         ],