diff --git a/examples/applications/ghnav-flask/githubnavigator/application.py b/examples/applications/ghnav-flask/githubnavigator/application.py
index ebaad659..cc26e570 100644
--- a/examples/applications/ghnav-flask/githubnavigator/application.py
+++ b/examples/applications/ghnav-flask/githubnavigator/application.py
@@ -1,9 +1,10 @@
 """Application module."""
 
 from dependency_injector import containers, providers
+from dependency_injector.ext.flask import create_app, Route
 from github import Github
 
-from . import services, views, webapp
+from . import services, views
 
 
 class Application(containers.DeclarativeContainer):
@@ -30,9 +31,9 @@ class Application(containers.DeclarativeContainer):
     )
 
     app = providers.Factory(
-        webapp.create_app,
+        create_app,
         name=__name__,
         routes=[
-            webapp.Route('/', 'index', index_view, methods=['GET']),
+            Route('/', 'index', index_view, methods=['GET']),
         ],
     )
diff --git a/src/dependency_injector/ext/__init__.py b/src/dependency_injector/ext/__init__.py
new file mode 100644
index 00000000..26e0e04b
--- /dev/null
+++ b/src/dependency_injector/ext/__init__.py
@@ -0,0 +1 @@
+"""Extensions package."""
diff --git a/examples/applications/ghnav-flask/githubnavigator/webapp.py b/src/dependency_injector/ext/flask.py
similarity index 90%
rename from examples/applications/ghnav-flask/githubnavigator/webapp.py
rename to src/dependency_injector/ext/flask.py
index e29f4746..e52c3d2a 100644
--- a/examples/applications/ghnav-flask/githubnavigator/webapp.py
+++ b/src/dependency_injector/ext/flask.py
@@ -1,4 +1,4 @@
-"""Web application module."""
+"""Flask extension module."""
 
 from flask import Flask