diff --git a/setup.py b/setup.py
index d3eff80..57d0e72 100644
--- a/setup.py
+++ b/setup.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 
 """The setup script."""
 
diff --git a/src/pynball/__init__.py b/src/pynball/__init__.py
index 1c026e1..a60a1d0 100644
--- a/src/pynball/__init__.py
+++ b/src/pynball/__init__.py
@@ -1,3 +1,4 @@
+#!/usr/bin/env python3
 """Top-level package for _pynball."""
 
 __title__ = "_pynball"
diff --git a/src/pynball/pynball.py b/src/pynball/pynball.py
index 90794f4..7c7c00c 100644
--- a/src/pynball/pynball.py
+++ b/src/pynball/pynball.py
@@ -20,8 +20,6 @@
 
 # Third party modules
 import click
-
-# TODO: replace 3rd party libmagic library with standard mimetypes library
 import magic
 
 #: Specifies the operating system to which the module is installed
diff --git a/tasks.py b/tasks.py
index dec7955..f3344a1 100644
--- a/tasks.py
+++ b/tasks.py
@@ -1,3 +1,4 @@
+#!/usr/bin/env python3
 """
 Tasks for maintaining the project.