diff --git a/rest_framework_swagger/introspectors.py b/rest_framework_swagger/introspectors.py
index fb84598a..9529362c 100644
--- a/rest_framework_swagger/introspectors.py
+++ b/rest_framework_swagger/introspectors.py
@@ -29,7 +29,11 @@
     import django_filters
 except ImportError:
     django_filters = None
-
+try:
+    # try and use C if available, since it's faster
+    from yaml import CSafeLoader as SafeLoader
+except ImportError:
+    from yaml import SafeLoader
 
 def get_view_description(view_cls, html=False, docstring=None):
     if docstring is not None:
@@ -944,7 +948,7 @@ def load_obj_from_docstring(self, docstring):
         yaml_string = "\n".join(split_lines[cut_from:])
         yaml_string = formatting.dedent(yaml_string)
         try:
-            return yaml.load(yaml_string)
+            return yaml.load(yaml_string, Loader=SafeLoader)
         except yaml.YAMLError as e:
             self.yaml_error = e
             return None