diff --git a/contrib/helpers.py b/contrib/helpers.py
index d2c9c5b..e46e96d 100644
--- a/contrib/helpers.py
+++ b/contrib/helpers.py
@@ -272,7 +272,7 @@ class Testers(object):
     def _read(self):
         self.testers = []
         with open(TESTERS_FILE, 'r') as fd:
-            testers = yaml.load(fd)
+            testers = yaml.safe_load(fd)
             for tester in testers:
                 name = tester['name']
                 email = tester['email']