diff --git a/pypipedrive/__init__.py b/pypipedrive/__init__.py
index 2fe4072..e55aaa0 100644
--- a/pypipedrive/__init__.py
+++ b/pypipedrive/__init__.py
@@ -1,3 +1,3 @@
-from api import PipeDrive
+from .api import PipeDrive
 
 __version__ = '0.1.1'
diff --git a/pypipedrive/api.py b/pypipedrive/api.py
index 274dadc..d1e3af1 100644
--- a/pypipedrive/api.py
+++ b/pypipedrive/api.py
@@ -10,7 +10,7 @@
 logger = logging.getLogger('pypipedrive')
 
 
-class PipeDriveError(StandardError):
+class PipeDriveError(Exception):
     pass
 
 
@@ -76,7 +76,7 @@ def get_response(self, base_url, **kwargs):
         base = base_url.split('.')
         base = '/'.join([self.format_url_attr(s, kwargs) for s in base])
         params = dict(
-            (k, v) for k, v in kwargs.iteritems() if not k.startswith('_'))
+            (k, v) for k, v in kwargs.items() if not k.startswith('_'))
         if 'method' in params:
             method = params['method']
             del params['method']
@@ -112,4 +112,4 @@ def format_url_attr(self, str, params):
     api_token = environ.get('PIPEDRIVE_API_TOKEN')
     p = PipeDrive(api_token)
     r = p.persons(limit=5)
-    print r
+    print(r)