diff --git a/lib/ansible/runner/filter_plugins/core.py b/lib/ansible/runner/filter_plugins/core.py
index 63eec29678..51a1f827e5 100644
--- a/lib/ansible/runner/filter_plugins/core.py
+++ b/lib/ansible/runner/filter_plugins/core.py
@@ -25,7 +25,7 @@ class FilterModule(object):
         return {
             'to_json': json.dumps,
             'from_json': json.loads,
-            'to_yaml': yaml.dump,
+            'to_yaml': yaml.safe_dump,
             'from_yaml': yaml.load,
         }