diff --git a/swh/storage/cli.py b/swh/storage/cli.py
index fe89a69..28db754 100644
--- a/swh/storage/cli.py
+++ b/swh/storage/cli.py
@@ -1,47 +1,50 @@
 # Copyright (C) 2015-2019  The Software Heritage developers
 # See the AUTHORS file at the top-level directory of this distribution
 # License: GNU General Public License version 3, or any later version
 # See top-level LICENSE file for more information
 
 import logging
 
 import click
 
 from swh.core.cli import CONTEXT_SETTINGS
 from swh.storage.api.server import load_and_check_config, app
 
 
 @click.group(name='storage', context_settings=CONTEXT_SETTINGS)
 @click.pass_context
 def storage(ctx):
     '''Software Heritage Storage tools.'''
     pass
 
 
 @storage.command(name='rpc-serve')
 @click.argument('config-path', required=1)
 @click.option('--host', default='0.0.0.0',
               metavar='IP', show_default=True,
               help="Host ip address to bind the server on")
 @click.option('--port', default=5002, type=click.INT,
               metavar='PORT', show_default=True,
               help="Binding port of the server")
 @click.option('--debug/--no-debug', default=True,
               help="Indicates if the server should run in debug mode")
-def serve(config_path, host, port, debug):
+@click.pass_context
+def serve(ctx, config_path, host, port, debug):
     '''Software Heritage Storage RPC server.
 
     Do NOT use this in a production environment.
     '''
+    if 'log_level' in ctx.obj:
+        logging.getLogger('werkzeug').setLevel(ctx.obj['log_level'])
     api_cfg = load_and_check_config(config_path, type='any')
     app.config.update(api_cfg)
     app.run(host, port=int(port), debug=bool(debug))
 
 
 def main():
     logging.basicConfig()
     return serve(auto_envvar_prefix='SWH_STORAGE')
 
 
 if __name__ == '__main__':
     main()