diff --git a/nested_lookup.py b/nested_lookup.py
index f22cd2d..fd4b97a 100644
--- a/nested_lookup.py
+++ b/nested_lookup.py
@@ -10,7 +10,7 @@ def _nested_lookup(key, document):
                 yield result
 
     if isinstance(document, dict):
-        for k, v in document.iteritems():
+        for k, v in document.items():
             if k == key:
                 yield v
             elif isinstance(v, dict):