diff --git a/03_containers_and_collections/03_dict.rst b/03_containers_and_collections/03_dict.rst
index 3dbeab4..c9091c8 100644
--- a/03_containers_and_collections/03_dict.rst
+++ b/03_containers_and_collections/03_dict.rst
@@ -1,44 +1,48 @@
->>> def most_significant(value):
-...     while value >= 10:
-...         value //= 10
-...     return value
-
->>> most_significant(12345)
-1
->>> most_significant(99)
-9
->>> most_significant(0)
-0
+.. code-block:: python
+
+    >>> def most_significant(value):
+    ...     while value >= 10:
+    ...         value //= 10
+    ...     return value
+
+    >>> most_significant(12345)
+    1
+    >>> most_significant(99)
+    9
+    >>> most_significant(0)
+    0
 
 ------------------------------------------------------------------------------
 
->>> def add(collection, key, value):
-...     index = most_significant(key)
-...     collection[index].append((key, value))
-
->>> def contains(collection, key):
-...     index = most_significant(key)
-...     for k, v in collection[index]:
-...         if k == key:
-...             return True
-...     return False
-
-# Create the collection of 10 lists
->>> collection = [[], [], [], [], [], [], [], [], [], []]
-
-# Add some items, using key/value pairs
->>> add(collection, 123, 'a')
->>> add(collection, 456, 'b')
->>> add(collection, 789, 'c')
->>> add(collection, 101, 'c')
-
-# Look at the collection
->>> collection
-[[], [(123, 'a'), (101, 'c')], [], [],
- [(456, 'b')], [], [], [(789, 'c')], [], []]
-
-# Check if the contains works correctly
->>> contains(collection, 123)
-True
->>> contains(collection, 1)
-False
+.. code-block:: python
+
+    >>> def add(collection, key, value):
+    ...     index = most_significant(key)
+    ...     collection[index].append((key, value))
+
+    >>> def contains(collection, key):
+    ...     index = most_significant(key)
+    ...     for k, v in collection[index]:
+    ...         if k == key:
+    ...             return True
+    ...     return False
+
+    Create the collection of 10 lists
+    >>> collection = [[], [], [], [], [], [], [], [], [], []]
+
+    Add some items, using key/value pairs
+    >>> add(collection, 123, 'a')
+    >>> add(collection, 456, 'b')
+    >>> add(collection, 789, 'c')
+    >>> add(collection, 101, 'c')
+
+    Look at the collection
+    >>> collection
+    [[], [(123, 'a'), (101, 'c')], [], [],
+     [(456, 'b')], [], [], [(789, 'c')], [], []]
+
+    Check if the contains works correctly
+    >>> contains(collection, 123)
+    True
+    >>> contains(collection, 1)
+    False
diff --git a/LICENSE b/LICENSE
new file mode 100644
index 0000000..a127a51
--- /dev/null
+++ b/LICENSE
@@ -0,0 +1,21 @@
+MIT License
+
+Copyright (c) 2022 Rick van Hattem
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
diff --git a/README.rst b/README.rst
index c13c265..15d3145 100644
--- a/README.rst
+++ b/README.rst
@@ -5,7 +5,7 @@ Code samples from Mastering Python
 (https://www.packtpub.com/application-development/mastering-python)
 
 All of the code in this repository is tested using the bundled tests. To run
-the tests yourself simply install the requirements and run the tests:
+the tests yourself you just have to install the requirements and run the tests:
 
     pip3 install --upgrade --requirement requirements.txt
     py.test