diff --git a/setup.py b/setup.py
index 06dc2f6..45d31a8 100644
--- a/setup.py
+++ b/setup.py
@@ -11,7 +11,7 @@
 exec(open(os.path.join(here, 'qapa/version.py')).read())
 
 setup(name='qapa',
-      version=__version__,
+      version=__version__,  # noqa: F821
       description='RNA-seq Quantification of Alternative Polyadenylation (QAPA)',
       url='http://github.com/morrislab/qapa',
       author='Kevin Ha',