diff --git a/mypy.ini b/mypy.ini
new file mode 100644
index 0000000..fecf03f
--- /dev/null
+++ b/mypy.ini
@@ -0,0 +1,2 @@
+[mypy]
+exclude = venv
\ No newline at end of file
diff --git a/pyproject.toml b/pyproject.toml
index f08a471..82ec4c4 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -2,7 +2,7 @@
 
 name = "flask-moreshell"
 
-version = "0.0.1"
+version = "0.0.2"
 
 description = "flask shell with IPython, BPython, PTPython!"
 
diff --git a/requirements_dev.txt b/requirements_dev.txt
new file mode 100644
index 0000000..57abb6a
--- /dev/null
+++ b/requirements_dev.txt
@@ -0,0 +1,4 @@
+pytest
+black
+mypy
+twine
\ No newline at end of file
diff --git a/setup.py b/setup.py
index 59b1a53..b779aea 100644
--- a/setup.py
+++ b/setup.py
@@ -1,4 +1,4 @@
-from setuptools import setup
+from setuptools import setup  # type: ignore[import]
 
 setup(
     entry_points={
diff --git a/src/__init__.py b/src/__init__.py
index f102a9c..3b93d0b 100644
--- a/src/__init__.py
+++ b/src/__init__.py
@@ -1 +1 @@
-__version__ = "0.0.1"
+__version__ = "0.0.2"
diff --git a/src/flask_moreshell.py b/src/flask_moreshell.py
index 7e16c71..3811666 100644
--- a/src/flask_moreshell.py
+++ b/src/flask_moreshell.py
@@ -9,11 +9,17 @@
 @click.command(context_settings=dict(ignore_unknown_options=True))
 @click.option("--shelltype", type=click.STRING, default=None)
 @with_appcontext
-def shell(shelltype):
-    """If you have IPython, PYTPython, or BPython installed, run them with your Flask application.
+def shell(shelltype: str):
+    """
+    Run `flask shell` command with IPython, BPython, PTPython.
+
+    If you have IPython, PYTPython, or BPython installed, run them with your Flask application.
     if none of them are installed, this loads the default python shell.
 
-    you can specify type of shell with --shelltype option."""
+    you can specify type of shell with --shelltype option.
+
+    :param shelltype: type of shell to use.
+    """
     if shelltype:
         try:
             if shelltype == "ipython":
@@ -71,7 +77,7 @@ def load_ipython():
 
 def load_bpython():
     """load bpython shell, with current application."""
-    import bpython
+    import bpython  # type: ignore[import]
 
     banner = "".join(
         f"Python {sys.version} on {sys.platform}\n"