diff --git a/CHANGELOG.md b/CHANGELOG.md
index 5d3825d..17eb45a 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,6 +1,13 @@
 Changelog
 =========
 
+0.5.0
+-----
+
+* Add trailing slash to package directory links at the root index.  Useful, for example,
+  with nginx proxy configurations, such as using the `ngx_aws_auth` module, where
+  directory paths can't be detected by the server.
+
 0.4.0
 -----
 
diff --git a/pypiprivate/__init__.py b/pypiprivate/__init__.py
index abeeedb..2b8877c 100644
--- a/pypiprivate/__init__.py
+++ b/pypiprivate/__init__.py
@@ -1 +1 @@
-__version__ = '0.4.0'
+__version__ = '0.5.0'
diff --git a/pypiprivate/storage.py b/pypiprivate/storage.py
index ff5fe64..f743dac 100644
--- a/pypiprivate/storage.py
+++ b/pypiprivate/storage.py
@@ -53,11 +53,14 @@ def join_path(self, *args):
     def listdir(self, path):
         path = self.join_path(self.base_path, path)
         try:
-            return os.listdir(path)
+            entries = os.listdir(path)
         except OSError as e:
             if e.errno == errno.ENOENT:
                 raise PathNotFound('Path {0} not found'.format(path))
             raise e
+        return [
+            ('{}/'.format(entry) if os.path.isdir(entry) else entry)
+            for entry in entries]
 
     def path_exists(self, path):
         path = self.join_path(self.base_path, path)
@@ -150,7 +153,7 @@ def listdir(self, path):
             raise PathNotFound('Path {0} not found'.format(s3_prefix))
         files = (c['Key'][len(s3_prefix):] for c in file_objs)
         files = [f for f in files if f != '']
-        dirs = [cp['Prefix'][len(s3_prefix):].rstrip('/') for cp in dir_objs]
+        dirs = [cp['Prefix'][len(s3_prefix):] for cp in dir_objs]
         return files + dirs
 
     def path_exists(self, path):
diff --git a/tox.ini b/tox.ini
index 51210f8..c65dc40 100644
--- a/tox.ini
+++ b/tox.ini
@@ -1,5 +1,5 @@
 [tox]
-envlist = py27, py34, py36
+envlist = py27, py34, py37
 
 [testenv:py36]
 commands = pytest -v tests/