diff --git a/auth/basic.py b/auth/basic.py
index 513e03d..8324d4b 100644
--- a/auth/basic.py
+++ b/auth/basic.py
@@ -32,7 +32,7 @@ def login(self, request):
         """Override this and implement the logic for your authentication
         method. You are supposed to return ``None`` if authentication
         succeeded, ``self.authentication_failed`` otherwise.
-        
+
         If the authentication succeeded you should also set request.user
         to the authenticated User."""
         raise NotImplementedError
diff --git a/parameters.py b/parameters.py
index ef39688..1672199 100644
--- a/parameters.py
+++ b/parameters.py
@@ -46,7 +46,7 @@ def __init__(self, name, param_type, doc=None, validators=None,
         self.validators = validators or []
         if self.validators and not hasattr(self.validators, '__iter__'):
             self.validators = [self.validators]
-        
+
         validator = get_type_validator(param_type)
         if validator and validator.__class__ not in \
                 [v.__class__ for v in self.validators]:
diff --git a/serializers/__init__.py b/serializers/__init__.py
index 05480d6..46d69db 100644
--- a/serializers/__init__.py
+++ b/serializers/__init__.py
@@ -78,7 +78,7 @@ def serialize(format, objs, method=None, out=None, **kwargs):
     fmt = get_formatter(format)(out=out)
     fmt.start()
 
-    if objs is None: 
+    if objs is None:
         fmt.none()
     elif len(objs) == 0:
         fmt.empty()
diff --git a/serializers/serializers.py b/serializers/serializers.py
index 680273e..9744f63 100644
--- a/serializers/serializers.py
+++ b/serializers/serializers.py
@@ -10,9 +10,9 @@ class Serialization(object):
     def __init__(self, name, method):
         self.name = name
         self.method = method
-    
+
     def apply(self, obj, **kwargs):
-        return (self.name, self.method(obj, **kwargs)) 
+        return (self.name, self.method(obj, **kwargs))
 
 class NoSerializationMethod(RuntimeError):
     pass
diff --git a/validators.py b/validators.py
index 22d4c8f..b3022e2 100644
--- a/validators.py
+++ b/validators.py
@@ -114,7 +114,7 @@ class DateTimeValidator(Validator):
     def validate(self, value):
         if isinstance(value, datetime.datetime):
             return value
-        
+
         str2datetime = datetime.datetime.strptime
         # trying to guess the format
         if len(value) == 16:
@@ -134,7 +134,7 @@ class DateValidator(Validator):
     def validate(self, value):
         if isinstance(value, datetime.date):
             return value
-        
+
         str2date = datetime.date.strptime
         # trying to guess the format
         if len(value) == 10:
@@ -149,7 +149,7 @@ class TimeValidator(Validator):
     def validate(self, value):
         if isinstance(value, datetime.time):
             return value
-        
+
         str2time = datetime.time.strptime
         # trying to guess the format
         if len(value) == 5: