diff --git a/calculator_of_Onmyoji/cm_server.py b/calculator_of_Onmyoji/cm_server.py
index b2fcec2..2b71d3c 100644
--- a/calculator_of_Onmyoji/cm_server.py
+++ b/calculator_of_Onmyoji/cm_server.py
@@ -11,6 +11,7 @@
 import webbrowser
 
 import flask
+from flask_cors import CORS
 from webob import exc
 
 from calculator_of_Onmyoji import cal_mitama
@@ -25,6 +26,7 @@
 else:
     app = flask.Flask(__name__)
 
+CORS(app)
 work_path = os.path.dirname(os.path.realpath(__file__))
 
 
@@ -78,4 +80,4 @@ def open_browser(host, port):
     t = threading.Thread(target=open_browser, args=(host, port))
     t.start()
 
-    app.run(host=host, port=port)
+    app.run(host=host, port=port, threaded=True)
diff --git a/requirements.txt b/requirements.txt
index 6f43c6c..5009c1c 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -4,4 +4,5 @@ xlwt
 requests
 tqdm
 flask
+flask-cors
 webob