diff --git a/setup.py b/setup.py
index 2934276..8acba9a 100644
--- a/setup.py
+++ b/setup.py
@@ -54,7 +54,7 @@ setup(
     author="Jason Paryani",
     author_email="pypi-contact@jparyani.com",
     url = 'https://github.com/jparyani/capnpc-python-cpp',
-    download_url = 'https://github.com/jparyani/capnpc-python-cpp/archive/v{}.zip'.format(VERSION),
+    download_url = 'https://github.com/jparyani/capnpc-python-cpp/archive/v%s.zip' % VERSION,
     keywords = ['capnp', 'capnproto'],
     classifiers = [
         'Development Status :: 3 - Alpha',