diff --git a/DEVELOPMENT.md b/DEVELOPMENT.md
index 955a1354..187412f8 100644
--- a/DEVELOPMENT.md
+++ b/DEVELOPMENT.md
@@ -54,10 +54,10 @@ $ optuna-dashboard sqlite:///db.sqlite3
 
 <summary>Environment variables for development</summary>
 
-If you set `OPTUNA_DASHBOARD_AUTO_RELOAD=1`, the server will automatically restart when the source codes are changed.
+If you set `OPTUNA_DASHBOARD_DEBUG=1`, the server will automatically restart when the source codes are changed.
 
 ```
-$ OPTUNA_DASHBOARD_AUTO_RELOAD=1 optuna-dashboard sqlite:///db.sqlite3
+$ OPTUNA_DASHBOARD_DEBUG=1 optuna-dashboard sqlite:///db.sqlite3
 ```
 
 </details>
diff --git a/optuna_dashboard/_app.py b/optuna_dashboard/_app.py
index 214648e8..167a6ed6 100644
--- a/optuna_dashboard/_app.py
+++ b/optuna_dashboard/_app.py
@@ -102,7 +102,7 @@ def get_trials(
     return trials
 
 
-def create_app(storage: BaseStorage) -> Bottle:
+def create_app(storage: BaseStorage, debug: bool = False) -> Bottle:
     app = Bottle()
 
     @app.hook("before_request")
@@ -256,7 +256,7 @@ def create_app(storage: BaseStorage) -> Bottle:
 
     @app.get("/static/<filename:path>")
     def send_static(filename: str) -> BottleViewReturn:
-        if "gzip" in request.headers["Accept-Encoding"]:
+        if not debug and "gzip" in request.headers["Accept-Encoding"]:
             gz_filename = filename.strip("/\\") + ".gz"
             if os.path.exists(os.path.join(STATIC_DIR, gz_filename)):
                 filename = gz_filename
diff --git a/optuna_dashboard/_cli.py b/optuna_dashboard/_cli.py
index c97ca482..15df49be 100644
--- a/optuna_dashboard/_cli.py
+++ b/optuna_dashboard/_cli.py
@@ -11,7 +11,7 @@ from . import __version__
 from ._app import create_app
 
 
-AUTO_RELOAD = os.environ.get("OPTUNA_DASHBOARD_AUTO_RELOAD") == "1"
+DEBUG = os.environ.get("OPTUNA_DASHBOARD_DEBUG") == "1"
 SERVER_CHOICES = ["wsgiref", "gunicorn"]
 
 
@@ -22,7 +22,7 @@ def run_wsgiref(app: Bottle, host: str, port: int, quiet: bool) -> None:
         port=port,
         server="wsgiref",
         quiet=quiet,
-        reloader=AUTO_RELOAD,
+        reloader=DEBUG,
     )
 
 
@@ -68,7 +68,7 @@ def main() -> None:
     else:
         storage = RDBStorage(args.storage)
 
-    app = create_app(storage)
+    app = create_app(storage, debug=DEBUG)
     if args.server == "wsgiref":
         run_wsgiref(app, args.host, args.port, args.quiet)
     elif args.server == "gunicorn":