diff --git a/README.rst b/README.rst
index 20605e58..6e3c696c 100644
--- a/README.rst
+++ b/README.rst
@@ -60,6 +60,21 @@ Status
 |                                       |    :alt: Github forks                                                                                              |
 +---------------------------------------+--------------------------------------------------------------------------------------------------------------------+
 
+Installation
+------------
+
+The *Dependency Injector* library is available on `PyPi`_::
+
+    pip install dependency_injector
+
+Documentation
+-------------
+
+The *Dependency Injector* documentation is hosted on ReadTheDocs:
+
+- `User's guide`_
+- `API docs`_
+
 Dependency injection
 --------------------
 
@@ -122,7 +137,7 @@ Listing of ``example.engines`` module:
     """Dependency injection example, engines module."""
 
 
-    class Engine(object):
+    class Engine:
         """Example engine base class.
 
         Engine is a heart of every car. Engine is a very common term and could be
@@ -138,8 +153,8 @@ Listing of ``example.engines`` module:
         """Diesel engine."""
 
 
-    class ElectroEngine(Engine):
-        """Electro engine."""
+    class ElectricEngine(Engine):
+        """Electric engine."""
 
 Listing of ``example.cars`` module:
 
@@ -148,7 +163,7 @@ Listing of ``example.cars`` module:
     """Dependency injection example, cars module."""
 
 
-    class Car(object):
+    class Car:
         """Example car."""
 
         def __init__(self, engine):
@@ -168,11 +183,11 @@ The next example demonstrates the creation of several cars with different engine
     if __name__ == '__main__':
         gasoline_car = example.cars.Car(example.engines.GasolineEngine())
         diesel_car = example.cars.Car(example.engines.DieselEngine())
-        electro_car = example.cars.Car(example.engines.ElectroEngine())
+        electric_car = example.cars.Car(example.engines.ElectricEngine())
 
 While the previous example demonstrates the advantages of dependency injection,
 there is a disadvantage demonstrated as well - the creation of a car requires 
-additional code to specificaty its dependencies. However, this disadvantage
+additional code to specify its dependencies. However, this disadvantage
 could be avoided by using a dependency injection framework for the creation of 
 an inversion of control container (IoC container).
 
@@ -197,7 +212,7 @@ Here's an example of the creation of several inversion of control containers
 
         diesel = providers.Factory(example.engines.DieselEngine)
 
-        electro = providers.Factory(example.engines.ElectroEngine)
+        electric = providers.Factory(example.engines.ElectricEngine)
 
 
     class Cars(containers.DeclarativeContainer):
@@ -209,14 +224,14 @@ Here's an example of the creation of several inversion of control containers
         diesel = providers.Factory(example.cars.Car,
                                    engine=Engines.diesel)
 
-        electro = providers.Factory(example.cars.Car,
-                                    engine=Engines.electro)
+        electric = providers.Factory(example.cars.Car,
+                                     engine=Engines.electric)
 
 
     if __name__ == '__main__':
         gasoline_car = Cars.gasoline()
         diesel_car = Cars.diesel()
-        electro_car = Cars.electro()
+        electric_car = Cars.electric()
 
 Dependency Injector structure
 -----------------------------
@@ -376,21 +391,6 @@ on our GitHub:
 
     https://github.com/ets-labs/python-dependency-injector
 
-Installation
-------------
-
-The *Dependency Injector* library is available on `PyPi`_::
-
-    pip install dependency_injector
-
-Documentation
--------------
-
-The *Dependency Injector* documentation is hosted on ReadTheDocs:
-
-- `User's guide`_ 
-- `API docs`_
-
 Feedback & Support
 ------------------
 
diff --git a/docs/images/miniapps/engines_cars/diagram.png b/docs/images/miniapps/engines_cars/diagram.png
index 6320bfdd..d3b28bb8 100644
Binary files a/docs/images/miniapps/engines_cars/diagram.png and b/docs/images/miniapps/engines_cars/diagram.png differ
diff --git a/docs/main/changelog.rst b/docs/main/changelog.rst
index cb71c263..47d32c87 100644
--- a/docs/main/changelog.rst
+++ b/docs/main/changelog.rst
@@ -7,6 +7,11 @@ that were made in every particular version.
 From version 0.7.6 *Dependency Injector* framework strictly 
 follows `Semantic versioning`_
 
+3.15.1
+------
+- Fix a couple of typos in the README.
+- Fix a couple of types in the diagram of "Engines-Cars" example.
+
 3.15.0
 ------
 - Add Python 3.8 support.
diff --git a/src/dependency_injector/__init__.py b/src/dependency_injector/__init__.py
index 8d9e7b32..9a8a47c6 100644
--- a/src/dependency_injector/__init__.py
+++ b/src/dependency_injector/__init__.py
@@ -1,6 +1,6 @@
 """Dependency injector top-level package."""
 
-__version__ = '3.15.0'
+__version__ = '3.15.1'
 """Version number that follows semantic versioning.
 
 :type: str