diff --git a/Dockerfile b/Dockerfile
index 392e1dd9..bc5b4150 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -15,7 +15,7 @@ FROM python:3.8-buster AS python-builder
 
 WORKDIR /usr/src
 RUN pip install --upgrade pip setuptools
-RUN pip install --progress-bar off PyMySQL[rsa] psycopg2-binary
+RUN pip install --progress-bar off PyMySQL[rsa] psycopg2-binary gunicorn
 
 ADD ./setup.cfg /usr/src/setup.cfg
 ADD ./setup.py /usr/src/setup.py
@@ -32,5 +32,5 @@ RUN mkdir /app
 WORKDIR /app
 
 EXPOSE 8080
-ENTRYPOINT ["optuna-dashboard", "--port", "8080", "--host", "0.0.0.0"]
+ENTRYPOINT ["optuna-dashboard", "--port", "8080", "--host", "0.0.0.0", "--server", "gunicorn"]
 
diff --git a/README.md b/README.md
index 8f4865cf..48651652 100644
--- a/README.md
+++ b/README.md
@@ -43,11 +43,13 @@ positional arguments:
   storage        DB URL (e.g. sqlite:///example.db)
 
 optional arguments:
-  -h, --help     show this help message and exit
-  --port PORT    port number (default: 8080)
-  --host HOST    hostname (default: 127.0.0.1)
-  --version, -v  show program's version number and exit
-  --quiet, -q    quiet
+  -h, --help            show this help message and exit
+  --port PORT           port number (default: 8080)
+  --host HOST           hostname (default: 127.0.0.1)
+  --server {wsgiref,gunicorn}
+                        server (default: wsgiref)
+  --version, -v         show program's version number and exit
+  --quiet, -q           quiet
 ```
 
 </details>
diff --git a/optuna_dashboard/cli.py b/optuna_dashboard/cli.py
index 146b3218..08dcd1e1 100644
--- a/optuna_dashboard/cli.py
+++ b/optuna_dashboard/cli.py
@@ -11,6 +11,7 @@ from .app import create_app
 
 
 AUTO_RELOAD = os.environ.get("OPTUNA_DASHBOARD_AUTO_RELOAD") == "1"
+SERVER_CHOICES = ["wsgiref", "gunicorn"]
 
 
 def main() -> None:
@@ -22,6 +23,9 @@ def main() -> None:
     parser.add_argument(
         "--host", help="hostname (default: %(default)s)", default="127.0.0.1"
     )
+    parser.add_argument(
+        "--server", help="server (default: %(default)s)", default="wsgiref", choices=SERVER_CHOICES
+    )
     parser.add_argument("--version", "-v", action="version", version=__version__)
     parser.add_argument("--quiet", "-q", help="quiet", action="store_true")
     args = parser.parse_args()
@@ -33,7 +37,7 @@ def main() -> None:
         storage = RDBStorage(args.storage)
 
     app = create_app(storage)
-    run(app, host=args.host, port=args.port, quiet=args.quiet, reloader=AUTO_RELOAD)
+    run(app, host=args.host, port=args.port, server=args.server, quiet=args.quiet, reloader=AUTO_RELOAD)
 
 
 if __name__ == "__main__":