diff --git a/docs/HISTORY.txt b/docs/HISTORY.txt
index a3a59f5..d341d4b 100644
--- a/docs/HISTORY.txt
+++ b/docs/HISTORY.txt
@@ -1,9 +1,13 @@
 Changelog
 =========
 
+1.0 - 2013-06-04
+----------------
+
+* Fix compatibility with Plone 4.3.
+  [davisagli]
+
 1.0b1 - 2009-04-17
 ------------------
 
 * Initial release
-
-
diff --git a/plone/principalsource/source.py b/plone/principalsource/source.py
index 81feb71..ee3728e 100644
--- a/plone/principalsource/source.py
+++ b/plone/principalsource/source.py
@@ -1,12 +1,14 @@
+from Products.CMFCore.utils import getToolByName
+from plone.principalsource.term import PrincipalTerm
+from z3c.formwidget.query.interfaces import IQuerySource
 from zope.interface import implements
-from zope.app.component.hooks import getSite
 from zope.schema.interfaces import IContextSourceBinder
 
-from z3c.formwidget.query.interfaces import IQuerySource
+try:
+    from zope.component.hooks import getSite
+except ImportError:
+    from zope.app.component.hooks import getSite
 
-from plone.principalsource.term import PrincipalTerm
-
-from Products.CMFCore.utils import getToolByName
 
 class PrincipalSource(object):
     """A queriable source for users, groups or principals (users and/or
@@ -197,6 +199,7 @@ class PrincipalSource(object):
     
 # Source binders
 
+
 class PrincipalSourceBinder(object):
     """Bind the principal source with either users or groups
     """
@@ -211,6 +214,6 @@ class PrincipalSourceBinder(object):
 
 # Vocabulary factories (for named vocabularies)
 
-PrincipalVocabularyFactory = PrincipalSourceBinder(users=True,  groups=True)
-UsersVocabularyFactory     = PrincipalSourceBinder(users=True,  groups=False)
-GroupsVocabularyFactory    = PrincipalSourceBinder(users=False, groups=True)
\ No newline at end of file
+PrincipalVocabularyFactory = PrincipalSourceBinder(users=True, groups=True)
+UsersVocabularyFactory = PrincipalSourceBinder(users=True, groups=False)
+GroupsVocabularyFactory = PrincipalSourceBinder(users=False, groups=True)
diff --git a/setup.cfg b/setup.cfg
index 8366168..3853736 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -2,6 +2,7 @@
 template = plone
 
 [egg_info]
-tag_build = dev
-tag_svn_revision = true
+tag_build = 
+tag_svn_revision = 0
+tag_date = 0
 
diff --git a/setup.py b/setup.py
index 5da3eb5..e79f90a 100644
--- a/setup.py
+++ b/setup.py
@@ -1,7 +1,7 @@
 from setuptools import setup, find_packages
 import os
 
-version = '1.0b2'
+version = '1.0'
 
 setup(name='plone.principalsource',
       version=version,
@@ -10,10 +10,10 @@ setup(name='plone.principalsource',
                        open(os.path.join("docs", "HISTORY.txt")).read(),
       # Get more strings from http://www.python.org/pypi?%3Aaction=list_classifiers
       classifiers=[
-        "Framework :: Plone",
-        "Programming Language :: Python",
-        "Topic :: Software Development :: Libraries :: Python Modules",
-        ],
+          "Framework :: Plone",
+          "Programming Language :: Python",
+          "Topic :: Software Development :: Libraries :: Python Modules",
+      ],
       keywords='plone user group principal source',
       author='Martin Aspeli',
       author_email='optilude@gmail.com',