diff --git a/docs/conf.py b/docs/conf.py
index c810821..176e121 100644
--- a/docs/conf.py
+++ b/docs/conf.py
@@ -67,7 +67,8 @@ def get_entity(package, entity):
     `__init__.py`.
     """
     path = os.path.join(os.path.dirname(__file__), "..", "ditto", "__init__.py")
-    with open(path).read() as init_py:
+    with open(path) as f:
+        init_py = f.read()
         find = "__%s__ = ['\"]([^'\"]+)['\"]" % entity
         return re.search(find, init_py).group(1)