diff --git a/Makefile b/Makefile
index 363ccaca7..6db805786 100644
--- a/Makefile
+++ b/Makefile
@@ -84,7 +84,7 @@ dist: .venv/timestamp
 	.venv/bin/python setup.py bdist_wheel
 
 .PHONY: release
-release: dist
+release: acceptance dist
 	.venv/bin/twine upload dist/*.whl
 
 run: build_test_app
diff --git a/c2cwsgiutils/pyramid_logging.py b/c2cwsgiutils/pyramid_logging.py
index 3b9270820..321af8d10 100644
--- a/c2cwsgiutils/pyramid_logging.py
+++ b/c2cwsgiutils/pyramid_logging.py
@@ -48,7 +48,7 @@ def _un_underscore(message):
     a lot of interesting fields with underscore. Therefore, it's a good idea to remove all those underscore
     prefixes.
     """
-    for key, value in message.items():
+    for key, value in list(message.items()):
         if key.startswith('_'):
             new_key = key[1:]
             if new_key not in message:
@@ -57,11 +57,11 @@ def _un_underscore(message):
     return message
 
 
-def new_make_message_dict(*args, **kargv):
+def _make_message_dict(*args, **kargv):
     """
     patch cee_syslog_handler to rename message->full_message otherwise this part is dropped by syslog.
     """
-    msg = orig_make_message_dict(*args, **kargv)
+    msg = cee_syslog_handler.make_message_dict(*args, **kargv)
     if msg['message'] != msg['short_message']:
         # only output full_message if it's different from short message
         msg['full_message'] = msg['message']
@@ -69,10 +69,6 @@ def new_make_message_dict(*args, **kargv):
     return _un_underscore(msg)
 
 
-orig_make_message_dict = cee_syslog_handler.make_message_dict
-cee_syslog_handler.make_message_dict = new_make_message_dict
-
-
 class PyramidCeeSysLogHandler(cee_syslog_handler.CeeSysLogHandler):
     """
     A CEE (JSON format) log handler with additional information about the current request.
@@ -81,6 +77,11 @@ def __init__(self, *args):
         super().__init__(*args)
         self.addFilter(_PYRAMID_FILTER)
 
+    def format(self, record):
+        message = _make_message_dict(record, self._debugging_fields, self._extra_fields, False, None,
+                                     self._facility)
+        return ": @cee: %s" % json.dumps(message)
+
 
 class JsonLogHandler(logging.StreamHandler):
     """
@@ -91,8 +92,8 @@ def __init__(self, stream=None):
         self.addFilter(_PYRAMID_FILTER)
 
     def format(self, record):
-        message = cee_syslog_handler.make_message_dict(record, debugging_fields=True, extra_fields=True,
-                                                       fqdn=False, localname=None, facility=None)
+        message = _make_message_dict(record, debugging_fields=True, extra_fields=True,
+                                     fqdn=False, localname=None, facility=None)
         return json.dumps(message)
 
 
diff --git a/setup.py b/setup.py
index 36bc54a30..22a097fa6 100644
--- a/setup.py
+++ b/setup.py
@@ -2,7 +2,7 @@
 from setuptools import setup, find_packages
 
 
-VERSION = '0.20.0'
+VERSION = '0.20.1'
 HERE = os.path.abspath(os.path.dirname(__file__))
 INSTALL_REQUIRES = open(os.path.join(HERE, 'requirements.txt')).read().splitlines()