diff --git a/tools/update_clouds_yaml.py b/tools/update_clouds_yaml.py
index 7be995e8f3..74dcdb2a07 100755
--- a/tools/update_clouds_yaml.py
+++ b/tools/update_clouds_yaml.py
@@ -65,7 +65,7 @@ class UpdateCloudsYaml(object):
     def _read_clouds(self):
         try:
             with open(self._clouds_path) as clouds_file:
-                self._clouds = yaml.load(clouds_file)
+                self._clouds = yaml.safe_load(clouds_file)
         except IOError:
             # The user doesn't have a clouds.yaml file.
             print("The user clouds.yaml file didn't exist.")