fix typo in setup.py

1 files changed, 1 insertions, 1 deletions

diff --git a/setup.py b/setup.py
index 66e9fbcd..bc649e83 100644
--- a/setup.py
+++ b/setup.py
@@ -59,7 +59,7 @@ if 'setuptools' in sys.modules:
             deps = [str(req) for req in pkg_resources.parse_requirements(f)]
         finally:
             f.close()
-        extra_options['extra_require'] = {
+        extra_options['extras_require'] = {
             'source': deps,
             'cssselect': 'cssselect>=0.7',
         }