diff --git a/CONTRIBUTORS.md b/CONTRIBUTORS.md
index 8c089b59..677655fa 100644
--- a/CONTRIBUTORS.md
+++ b/CONTRIBUTORS.md
@@ -9,3 +9,5 @@
 * [atodorov](https://github.com/atodorov)
 * [bittner](https://github.com/bittner)
 * [federicobond](https://github.com/federicobond)
+* [clintonb](https://github.com/clintonb)
+
diff --git a/README.rst b/README.rst
index 690ae2f8..33e584a0 100644
--- a/README.rst
+++ b/README.rst
@@ -103,7 +103,7 @@ If it's just done for convenience that's really up to you the developer to fix.
 Contributing
 ------------
 
-Please feel free to add your name to the ``CONTRIBUTORS.rst`` file if you want to
+Please feel free to add your name to the ``CONTRIBUTORS.md`` file if you want to
 be credited when pull requests get merged. You can also add to the
 ``CHANGELOG.rst`` file if you wish, although we'll also do that when merging.
 
diff --git a/pylint_django/utils.py b/pylint_django/utils.py
index ac1774db..27072251 100644
--- a/pylint_django/utils.py
+++ b/pylint_django/utils.py
@@ -1,7 +1,7 @@
 """Utils."""
 import sys
 
-from astroid.util import YES
+from astroid.util import Uninferable 
 from astroid.bases import Instance
 from astroid.nodes import ClassDef
 from astroid.exceptions import InferenceError
@@ -15,7 +15,7 @@ def node_is_subclass(cls, *subclass_names):
     if not isinstance(cls, (ClassDef, Instance)):
         return False
 
-    if cls.bases == YES:
+    if cls.bases == Uninferable:
         return False
     for base_cls in cls.bases:
         try: