diff --git a/setup.py b/setup.py
index f547ee7..28ee3c5 100644
--- a/setup.py
+++ b/setup.py
@@ -48,7 +48,7 @@ array of URLs.""",
     author_email='jan@dittberner.info',
     url='http://debian-stuff.dittberner.info/ddportfolioservice',
     license='AGPL-3.0+',
-    install_requires=["Pylons>=0.10rc1"],
+    install_requires=["Pylons>=0.10rc1", 'babel>=0.9.4'],
     packages=find_packages(exclude=['ez_setup']),
     include_package_data=True,
     test_suite='nose.collector',