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--- a/pyforge/setup.py
+++ b/pyforge/setup.py
@@ -29,6 +29,7 @@
         "sqlalchemy-migrate",
         "Markdown >= 2.0.3",
         "Pygments >= 1.1.1",
+        "PyYAML >= 3.09",
         ],
     setup_requires=["PasteScript >= 1.7"],
     paster_plugins=['PasteScript', 'Pylons', 'TurboGears2', 'tg.devtools'],