Depends on itsdangerous>=0.12 now

setup.py

@@ -93,7 +93,7 @@ setup(
     install_requires=[
         'Werkzeug>=0.7',
         'Jinja2>=2.4',
-        'itsdangerous>=0.17'
+        'itsdangerous>=0.21'
     ],
     classifiers=[
         'Development Status :: 4 - Beta',

tox.ini

@@ -3,5 +3,4 @@ envlist = py26, py27, pypy, py33
 
 [testenv]
 deps = -egit+git://github.com/mitsuhiko/werkzeug.git@sprint-branch#egg=werkzeug
-       -egit+git://github.com/mitsuhiko/itsdangerous.git#egg=itsdangerous
 commands = python run-tests.py []