diff --git a/.github/workflows/test_for_python_test_example.yml b/.github/workflows/test_for_python_test_example.yml
index 7aa48ab..f881bd5 100644
--- a/.github/workflows/test_for_python_test_example.yml
+++ b/.github/workflows/test_for_python_test_example.yml
@@ -15,7 +15,10 @@ jobs:
     - name: Install Library
       run: |
         python3 -m pip install --upgrade pip
-        pip install requests flask
+        pip install requests flask mypy
+    - name: Run mypy
+      run: |
+        mypy python_test_example --config-file python_test_example/mypy.ini
     - name: Run unittest
       run: |
         cd python_test_example
diff --git a/python_test_example/Dockerfile b/python_test_example/Dockerfile
index 9d0711b..e97349f 100644
--- a/python_test_example/Dockerfile
+++ b/python_test_example/Dockerfile
@@ -1,4 +1,4 @@
 FROM python:3.7-slim
 
 RUN pip install --no-cache-dir --upgrade pip setuptools wheel \
-  && pip install --no-cache-dir requests flask
+  && pip install --no-cache-dir requests flask mypy
diff --git a/python_test_example/Makefile b/python_test_example/Makefile
index 9f0661e..ae48f0e 100644
--- a/python_test_example/Makefile
+++ b/python_test_example/Makefile
@@ -10,6 +10,10 @@ dbuild:
 drun:
 	docker run --rm -it -v $(curdir):/opt -w /opt $(image):$(tag) bash
 
+.PHONY: drmi
+drmi:
+	docker rmi -f $(image):$(tag)
+
 .PHONY: all_test
 all_test:
 	python3 -m unittest discover --verbose --pattern "*_test.py"
diff --git a/python_test_example/flask_app/app.py b/python_test_example/flask_app/app.py
index de21bc0..f3de11e 100644
--- a/python_test_example/flask_app/app.py
+++ b/python_test_example/flask_app/app.py
@@ -1,6 +1,7 @@
 import json
 
 from flask import Flask, jsonify, make_response
+from flask.wrappers import Response
 
 from .service import Service
 
@@ -10,12 +11,12 @@
 service = Service()
 
 @app.route('/', methods=['GET'])
-def index():
+def index() -> Response:
     message = {'message': 'OK'}
     return make_response(jsonify(message), 200)
 
 @app.route('/predict', methods=['POST'])
-def predict():
+def predict() -> Response:
     print('Call predict in app')
     target = 'A'
     if not service.check_model():
diff --git a/python_test_example/flask_app/model.py b/python_test_example/flask_app/model.py
index ef296ea..f136e85 100644
--- a/python_test_example/flask_app/model.py
+++ b/python_test_example/flask_app/model.py
@@ -1,3 +1,3 @@
-def load_model():
+def load_model() -> str:
     print('Call load_model in model')
     return 'model'
diff --git a/python_test_example/flask_app/service.py b/python_test_example/flask_app/service.py
index 5f4791f..98dd09e 100644
--- a/python_test_example/flask_app/service.py
+++ b/python_test_example/flask_app/service.py
@@ -5,7 +5,7 @@
 print('In service')
 
 class Service:
-    def __init__(self):
+    def __init__(self) -> None:
         print('Init Service')
         self.model = load_model()
         print(f'self.model: {self.model}')
diff --git a/python_test_example/mypy.ini b/python_test_example/mypy.ini
new file mode 100644
index 0000000..9db99d4
--- /dev/null
+++ b/python_test_example/mypy.ini
@@ -0,0 +1,18 @@
+[mypy]
+python_version = 3.7
+disallow_untyped_defs = True
+ignore_missing_imports = True
+warn_redundant_casts = True
+no_implicit_optional = True
+
+[mypy-flask_app.app_test.*]
+disallow_untyped_defs = False
+
+[mypy-i76_testcase_subclass.utils_test.*]
+disallow_untyped_defs = False
+
+[mypy-i77_setup_and_teardown.*]
+disallow_untyped_defs = False
+
+[mypy-mock.my_class_test.*]
+disallow_untyped_defs = False