diff --git a/oauth2_provider/validators.py b/oauth2_provider/validators.py
index 7f9d994..4bf3f3a 100644
--- a/oauth2_provider/validators.py
+++ b/oauth2_provider/validators.py
@@ -27,11 +27,11 @@ class URIValidator(URLValidator):
 
 class RedirectURIValidator(URIValidator):
     def __init__(self, allowed_schemes, allow_fragments=False):
-        super().__init__(schemes=allowed_schemes)
+        super(RedirectURIValidator, self).__init__(schemes=allowed_schemes)
         self.allow_fragments = allow_fragments
 
     def __call__(self, value):
-        super().__call__(value)
+        super(RedirectURIValidator, self).__call__(value)
         value = force_text(value)
         scheme, netloc, path, query, fragment = urlsplit(value)
         if fragment and not self.allow_fragments:
diff --git a/setup.cfg b/setup.cfg
index 496c2b3..9db366e 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -1,6 +1,6 @@
 [metadata]
 name = geonode-oauth-toolkit
-version = 1.1.4.2
+version = 1.1.4.3
 description = OAuth2 Provider for Django/GeoNode
 author = Federico Frenguelli, Massimiliano Pippi, Alessio Fabiani
 author_email = synasius@gmail.com