diff --git a/examples/applications/ghnav-flask/README.rst b/examples/applications/ghnav-flask/README.rst
new file mode 100644
index 00000000..cd472cc3
--- /dev/null
+++ b/examples/applications/ghnav-flask/README.rst
@@ -0,0 +1,93 @@
+Flask Dependency Injection Example
+==================================
+
+Application ``githubnavigator`` is a `Flask <https://flask.palletsprojects.com/>`_ +
+`Dependency Injector <http://python-dependency-injector.ets-labs.org/>`_ application.
+
+Run
+---
+
+Install requirements:
+
+.. code-block:: bash
+
+    pip install -r requirements.txt
+
+To run the application do:
+
+.. code-block:: bash
+
+    export FLASK_APP=githubnavigator.entrypoint
+    export FLASK_ENV=development
+    export GITHUB_TOKEN=
+    flask run
+
+The output should be something like:
+
+.. code-block::
+
+    * Serving Flask app "githubnavigator.entrypoint" (lazy loading)
+    * Environment: development
+    * Debug mode: on
+    * Running on http://127.0.0.1:5000/ (Press CTRL+C to quit)
+    * Restarting with fsevents reloader
+    * Debugger is active!
+    * Debugger PIN: 473-587-859
+
+After that visit http://127.0.0.1:5000/ in your browser.
+
+.. note::
+
+
+   Github has a rate limit. When thre rate limit is exceed you will see an exception
+   ``github.GithubException.RateLimitExceededException``. For unauthenticated requests, the rate
+   limit allows for up to 60 requests per hour. To extend the limit to 5000 requests per hour you
+   need to set personal access token.
+
+   It's easy:
+
+   - Follow this `guide <https://docs.github.com/en/github/authenticating-to-github/creating-a-personal-access-token>`_ to create a token.
+   - Set a token to the environment variable:
+
+   .. code-block:: bash
+
+      export GITHUB_TOKEN==<your token>
+
+   - Restart the app with ``flask run``
+
+   `Read more on rate limit <https://developer.github.com/v3/#rate-limiting>`_
+
+Test
+----
+
+This application comes with unit tests.
+
+To run the tests do:
+
+.. code-block:: bash
+
+   py.test githubnavigator/tests.py --cov=githubnavigator
+
+The output should be something like:
+
+.. code-block::
+
+   platform darwin -- Python 3.8.3, pytest-5.4.3, py-1.9.0, pluggy-0.13.1
+   plugins: flask-1.0.0, cov-2.10.0, asyncio-0.14.0
+   collected 2 items
+
+   githubnavigator/tests.py ..                                                                                                                                                                              [100%]
+
+   ---------- coverage: platform darwin, python 3.8.3-final-0 -----------
+   Name                             Stmts   Miss  Cover
+   ----------------------------------------------------
+   githubnavigator/__init__.py          0      0   100%
+   githubnavigator/application.py      10      0   100%
+   githubnavigator/entrypoint.py        5      5     0%
+   githubnavigator/services.py         13      0   100%
+   githubnavigator/tests.py            38      0   100%
+   githubnavigator/views.py             7      0   100%
+   ----------------------------------------------------
+   TOTAL                               73      5    93%
+
+
diff --git a/examples/applications/ghnav-flask/config.yml b/examples/applications/ghnav-flask/config.yml
index 4409662f..9bd0ccd3 100644
--- a/examples/applications/ghnav-flask/config.yml
+++ b/examples/applications/ghnav-flask/config.yml
@@ -1,5 +1,4 @@
 github:
-  auth_token: ${GITHUB_TOKEN}
   request_timeout: 10
 search:
   default_term: "Dependency Injector"
diff --git a/examples/applications/ghnav-flask/githubnavigator/entrypoint.py b/examples/applications/ghnav-flask/githubnavigator/entrypoint.py
index fb545b90..783f49f7 100644
--- a/examples/applications/ghnav-flask/githubnavigator/entrypoint.py
+++ b/examples/applications/ghnav-flask/githubnavigator/entrypoint.py
@@ -5,4 +5,5 @@ from .application import Application
 
 application = Application()
 application.config.from_yaml('config.yml')
+application.config.github.token.from_env('GITHUB_TOKEN')
 app = application.app()