diff --git a/emmett/__version__.py b/emmett/__version__.py
index 29768434..fc78dc7b 100644
--- a/emmett/__version__.py
+++ b/emmett/__version__.py
@@ -1 +1 @@
-__version__ = "2.5.11"
+__version__ = "2.5.12"
diff --git a/emmett/_reloader.py b/emmett/_reloader.py
index f3edd2f0..58e1a167 100644
--- a/emmett/_reloader.py
+++ b/emmett/_reloader.py
@@ -17,7 +17,6 @@
 import os
 import signal
 import subprocess
-import ssl
 import sys
 import time
 
@@ -151,8 +150,8 @@ def run(self, process):
 def run_with_reloader(
     interface,
     app_target,
-    host,
-    port,
+    host='127.0.0.1',
+    port=8000,
     loop='auto',
     log_level=None,
     log_access=False,
@@ -174,8 +173,10 @@ def run_with_reloader(
 
             process = multiprocessing.Process(
                 target=_server_run,
-                args=(interface, app_target, host, port),
+                args=(interface, app_target),
                 kwargs={
+                    "host": host,
+                    "port": port,
                     "loop": loop,
                     "log_level": log_level,
                     "log_access": log_access,
diff --git a/emmett/cli.py b/emmett/cli.py
index dd1f2eba..9cd977c2 100644
--- a/emmett/cli.py
+++ b/emmett/cli.py
@@ -287,12 +287,11 @@ def develop_command(
     runner(
         interface,
         app_target,
-        host,
-        port,
+        host=host,
+        port=port,
         loop=loop,
         log_level='debug',
         log_access=True,
-        threads=1,
         threading_mode="workers",
         ssl_certfile=ssl_certfile,
         ssl_keyfile=ssl_keyfile,
@@ -315,6 +314,9 @@ def develop_command(
 @click.option(
     '--interface', type=click.Choice(['rsgi', 'asgi']), default='rsgi',
     help='Application interface.')
+@click.option(
+    '--http', type=click.Choice(['auto', '1', '2']), default='auto',
+    help='HTTP version.')
 @click.option(
     '--ws/--no-ws', is_flag=True, default=True,
     help='Enable websockets support.')
@@ -342,7 +344,7 @@ def develop_command(
     '--ssl-keyfile', type=str, default=None, help='SSL key file')
 @pass_script_info
 def serve_command(
-    info, host, port, workers, threads, threading_mode, interface, ws, loop, opt,
+    info, host, port, workers, threads, threading_mode, interface, http, ws, loop, opt,
     log_level, access_log, backlog, backpressure, ssl_certfile, ssl_keyfile
 ):
     app_target = info._get_import_name()
@@ -360,6 +362,7 @@ def serve_command(
         threading_mode=threading_mode,
         backlog=backlog,
         backpressure=backpressure,
+        http=http,
         enable_websockets=ws,
         ssl_certfile=ssl_certfile,
         ssl_keyfile=ssl_keyfile,
diff --git a/emmett/server.py b/emmett/server.py
index b59f4435..92bd1f49 100644
--- a/emmett/server.py
+++ b/emmett/server.py
@@ -28,6 +28,7 @@ def run(
     threading_mode='workers',
     backlog=1024,
     backpressure=None,
+    http='auto',
     enable_websockets=True,
     ssl_certfile: Optional[str] = None,
     ssl_keyfile: Optional[str] = None
@@ -43,6 +44,7 @@ def run(
         threading_mode=threading_mode,
         loop=loop,
         loop_opt=loop_opt,
+        http=http,
         websockets=enable_websockets,
         backlog=backlog,
         backpressure=backpressure,
diff --git a/emmett/tools/auth/ext.py b/emmett/tools/auth/ext.py
index 70d89bec..4477af19 100644
--- a/emmett/tools/auth/ext.py
+++ b/emmett/tools/auth/ext.py
@@ -355,14 +355,14 @@ def _registration_email(self, user, data):
         data['email'] = user.email
         return self.app.ext.MailExtension.send_mail(
             recipients=user.email,
-            subject=self.config.messages['registration_email_subject'],
+            subject=str(self.config.messages['registration_email_subject']),
             body=str(self.config.messages['registration_email_text'] % data))
 
     def _reset_password_email(self, user, data):
         data['email'] = user.email
         return self.app.ext.MailExtension.send_mail(
             recipients=user.email,
-            subject=self.config.messages['reset_password_email_subject'],
+            subject=str(self.config.messages['reset_password_email_subject']),
             body=str(self.config.messages['reset_password_email_text'] % data))
 
 
diff --git a/pyproject.toml b/pyproject.toml
index d9c7dd27..99cd9379 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -3,9 +3,9 @@ name = "emmett"
 
 [tool.poetry]
 name = "emmett"
-version = "2.5.11"
+version = "2.5.12"
 description = "The web framework for inventors"
-authors = ["Giovanni Barillari <gi0baro@d4net.org>"]
+authors = ["Giovanni Barillari <g@baro.dev>"]
 license = "BSD-3-Clause"
 
 readme = "README.md"
@@ -47,7 +47,7 @@ emmett = "emmett.cli:main"
 [tool.poetry.dependencies]
 python = "^3.8"
 click = ">=6.0"
-granian = "~1.4.1"
+granian = "~1.5.0"
 emmett-crypto = "^0.6"
 pendulum = "~3.0.0"
 pyDAL = "17.3"