diff --git a/docs/conf.py b/docs/conf.py
index b02605e..e033c6b 100644
--- a/docs/conf.py
+++ b/docs/conf.py
@@ -19,14 +19,14 @@
 
 # -- Project information -----------------------------------------------------
 
-project = 'hubploy'
-copyright = '2018, Yuvi Panda'
-author = 'Yuvi Panda'
+project = "hubploy"
+copyright = "2018, Yuvi Panda"
+author = "Yuvi Panda"
 
 # The short X.Y version
-version = ''
+version = ""
 # The full version, including alpha/beta/rc tags
-release = '0.1'
+release = "0.1"
 
 
 # -- General configuration ---------------------------------------------------
@@ -38,22 +38,19 @@
 # Add any Sphinx extension module names here, as strings. They can be
 # extensions coming with Sphinx (named 'sphinx.ext.*') or your custom
 # ones.
-extensions = [
-    'sphinx.ext.intersphinx',
-    'sphinxcontrib.mermaid'
-]
+extensions = ["sphinx.ext.intersphinx", "sphinxcontrib.mermaid"]
 
 # Add any paths that contain templates here, relative to this directory.
-templates_path = ['_templates']
+templates_path = ["_templates"]
 
 # The suffix(es) of source filenames.
 # You can specify multiple suffix as a list of string:
 #
 # source_suffix = ['.rst', '.md']
-source_suffix = '.rst'
+source_suffix = ".rst"
 
 # The master toctree document.
-master_doc = 'index'
+master_doc = "index"
 
 # The language for content autogenerated by Sphinx. Refer to documentation
 # for a list of supported languages.
@@ -65,10 +62,10 @@
 # List of patterns, relative to source directory, that match files and
 # directories to ignore when looking for source files.
 # This pattern also affects html_static_path and html_extra_path .
-exclude_patterns = ['_build', 'Thumbs.db', '.DS_Store']
+exclude_patterns = ["_build", "Thumbs.db", ".DS_Store"]
 
 # The name of the Pygments (syntax highlighting) style to use.
-pygments_style = 'sphinx'
+pygments_style = "sphinx"
 
 
 # -- Options for HTML output -------------------------------------------------
@@ -76,7 +73,7 @@
 # The theme to use for HTML and HTML Help pages.  See the documentation for
 # a list of builtin themes.
 #
-html_theme = 'alabaster'
+html_theme = "alabaster"
 
 # Theme options are theme-specific and customize the look and feel of a theme
 # further.  For a list of options available for each theme, see the
@@ -87,7 +84,7 @@
 # Add any paths that contain custom static files (such as style sheets) here,
 # relative to this directory. They are copied after the builtin static files,
 # so a file named "default.css" will overwrite the builtin "default.css".
-html_static_path = ['_static']
+html_static_path = ["_static"]
 
 # Custom sidebar templates, must be a dictionary that maps document names
 # to template names.
@@ -103,7 +100,7 @@
 # -- Options for HTMLHelp output ---------------------------------------------
 
 # Output file base name for HTML help builder.
-htmlhelp_basename = 'hubploydoc'
+htmlhelp_basename = "hubploydoc"
 
 
 # -- Options for LaTeX output ------------------------------------------------
@@ -112,15 +109,12 @@
     # The paper size ('letterpaper' or 'a4paper').
     #
     # 'papersize': 'letterpaper',
-
     # The font size ('10pt', '11pt' or '12pt').
     #
     # 'pointsize': '10pt',
-
     # Additional stuff for the LaTeX preamble.
     #
     # 'preamble': '',
-
     # Latex figure (float) alignment
     #
     # 'figure_align': 'htbp',
@@ -130,8 +124,7 @@
 # (source start file, target name, title,
 #  author, documentclass [howto, manual, or own class]).
 latex_documents = [
-    (master_doc, 'hubploy.tex', 'hubploy Documentation',
-     'Yuvi Panda', 'manual'),
+    (master_doc, "hubploy.tex", "hubploy Documentation", "Yuvi Panda", "manual"),
 ]
 
 
@@ -139,10 +132,7 @@
 
 # One entry per manual page. List of tuples
 # (source start file, name, description, authors, manual section).
-man_pages = [
-    (master_doc, 'hubploy', 'hubploy Documentation',
-     [author], 1)
-]
+man_pages = [(master_doc, "hubploy", "hubploy Documentation", [author], 1)]
 
 
 # -- Options for Texinfo output ----------------------------------------------
@@ -151,9 +141,15 @@
 # (source start file, target name, title, author,
 #  dir menu entry, description, category)
 texinfo_documents = [
-    (master_doc, 'hubploy', 'hubploy Documentation',
-     author, 'hubploy', 'One line description of project.',
-     'Miscellaneous'),
+    (
+        master_doc,
+        "hubploy",
+        "hubploy Documentation",
+        author,
+        "hubploy",
+        "One line description of project.",
+        "Miscellaneous",
+    ),
 ]
 
 
@@ -162,7 +158,7 @@
 # -- Options for intersphinx extension ---------------------------------------
 
 # Example configuration for intersphinx: refer to the Python standard library.
-intersphinx_mapping = {'https://docs.python.org/': None}
+intersphinx_mapping = {"https://docs.python.org/": None}
 
 
-mermaid_params = ['--theme', 'neutral']
+mermaid_params = ["--theme", "neutral"]
diff --git a/hubploy/__main__.py b/hubploy/__main__.py
index 477b6a2..a1314ea 100644
--- a/hubploy/__main__.py
+++ b/hubploy/__main__.py
@@ -97,6 +97,7 @@ def main():
     )
     deploy_parser.add_argument(
         "--dry-run",
+        default=False,
         action="store_true",
         help="Dry run the helm upgrade command. This also renders the "
         + "chart to STDOUT. This is not allowed to be used in a "
@@ -120,6 +121,10 @@ def main():
 
     args = argparser.parse_args()
 
+    if args.command is None:
+        argparser.print_help()
+        sys.exit(1)
+
     if args.verbose:
         logger.setLevel(logging.INFO)
     elif args.debug:
diff --git a/setup.py b/setup.py
index 9b71bba..6168eb6 100644
--- a/setup.py
+++ b/setup.py
@@ -2,14 +2,11 @@
 
 setuptools.setup(
     name="hubploy",
-    version="0.4.1",
+    version="0.4.2",
     url="https://github.com/berkeley-dsep-infra/hubploy",
     author="Yuvi Panda and Shane Knapp",
     packages=setuptools.find_packages(),
-    install_requires=[
-        "kubernetes<=31.0.0",
-        "boto3"
-    ],
+    install_requires=["kubernetes<=31.0.0", "boto3"],
     python_requires=">=3.6",
     entry_points={
         "console_scripts": [