diff --git a/platypush/backend/http/app/routes/index.py b/platypush/backend/http/app/routes/index.py
index ea3e6424..f9ee147d 100644
--- a/platypush/backend/http/app/routes/index.py
+++ b/platypush/backend/http/app/routes/index.py
@@ -8,6 +8,7 @@ from platypush.backend.http.app.utils import authenticate, get_websocket_port
 
 from platypush.backend.http.utils import HttpUtils
 from platypush.config import Config
+from platypush.message import Message
 
 index = Blueprint('index', __name__, template_folder=template_folder)
 
@@ -70,7 +71,7 @@ def index():
                            websocket_port=get_websocket_port(),
                            template_folder=template_folder, static_folder=static_folder,
                            plugins=Config.get_plugins(), backends=Config.get_backends(),
-                           procedures=json.dumps(Config.get_procedures()),
+                           procedures=json.dumps(Config.get_procedures(), cls=Message.Encoder),
                            has_ssl=http_conf.get('ssl_cert') is not None)
 
 
diff --git a/platypush/message/__init__.py b/platypush/message/__init__.py
index d55d45a4..270ec0ba 100644
--- a/platypush/message/__init__.py
+++ b/platypush/message/__init__.py
@@ -24,6 +24,8 @@ class Message(object):
                 return int(obj)
             if isinstance(obj, np.ndarray):
                 return obj.tolist()
+            if callable(obj):
+                return '<function at {}.{}>'.format(obj.__module__, obj.__name__)
 
             return