diff --git a/src/calibre/constants.py b/src/calibre/constants.py
index d6e4cb98ec..c5871d4a49 100644
--- a/src/calibre/constants.py
+++ b/src/calibre/constants.py
@@ -2,7 +2,7 @@ __license__   = 'GPL v3'
 __copyright__ = '2008, Kovid Goyal kovid@kovidgoyal.net'
 __docformat__ = 'restructuredtext en'
 __appname__   = 'calibre'
-__version__   = '0.6.22'
+__version__   = '0.6.23'
 __author__    = "Kovid Goyal <kovid@kovidgoyal.net>"
 
 import re
diff --git a/src/calibre/trac/plugins/download.py b/src/calibre/trac/plugins/download.py
index 2dde7024bf..bcd936c6f4 100644
--- a/src/calibre/trac/plugins/download.py
+++ b/src/calibre/trac/plugins/download.py
@@ -9,7 +9,7 @@ DEPENDENCIES = [
             ('Python Imaging Library', '1.1.6', 'imaging', 'python-imaging', 'python-imaging'),
             ('libusb', '0.1.12', None, None, None),
             ('Qt', '4.5.1', 'qt', 'libqt4-core libqt4-gui', 'qt4'),
-            ('PyQt', '4.5.1', 'PyQt4', 'python-qt4', 'PyQt4'),
+            ('PyQt', '4.6.1', 'PyQt4', 'python-qt4', 'PyQt4'),
             ('python-mechanize', '0.1.11', 'dev-python/mechanize', 'python-mechanize', 'python-mechanize'),
             ('ImageMagick', '6.3.5', 'imagemagick', 'imagemagick', 'ImageMagick'),
             ('xdg-utils', '1.0.2', 'xdg-utils', 'xdg-utils', 'xdg-utils'),