diff --git a/ckanext/privatedatasets/actions.py b/ckanext/privatedatasets/actions.py
index e839395..ce60f73 100644
--- a/ckanext/privatedatasets/actions.py
+++ b/ckanext/privatedatasets/actions.py
@@ -1,6 +1,7 @@
 # -*- coding: utf-8 -*-
 
 # Copyright (c) 2014 - 2017 CoNWeT Lab., Universidad Politécnica de Madrid
+# Copyright (c) 2018 Future Internet Consulting and Development Solutions S.L.
 
 # This file is part of CKAN Private Dataset Extension.
 
@@ -21,6 +22,7 @@ from __future__ import absolute_import
 
 import importlib
 import logging
+import os
 
 import ckan.plugins as plugins
 
@@ -151,7 +153,7 @@ def _process_package(context, request_data):
     plugins.toolkit.check_access(method, context, request_data)
 
     # Get the parser from the configuration
-    class_path = plugins.toolkit.config.get(PARSER_CONFIG_PROP, '')
+    class_path = os.environ.get(PARSER_CONFIG_PROP.upper().replace('.', '_'), plugins.toolkit.config.get(PARSER_CONFIG_PROP, ''))
 
     if class_path != '':
         try:
diff --git a/ckanext/privatedatasets/helpers.py b/ckanext/privatedatasets/helpers.py
old mode 100755
new mode 100644
index ad2b455..01f3fc7
--- a/ckanext/privatedatasets/helpers.py
+++ b/ckanext/privatedatasets/helpers.py
@@ -1,6 +1,7 @@
 # -*- coding: utf-8 -*-
 
 # Copyright (c) 2014-2015 CoNWeT Lab., Universidad Politécnica de Madrid
+# Copyright (c) 2018 Future Internet Consulting and Development Solutions S.L.
 
 # This file is part of CKAN Private Dataset Extension.
 
@@ -20,6 +21,7 @@
 from __future__ import absolute_import
 
 import logging
+import os
 
 from ckan.common import request
 import ckan.model as model
@@ -64,9 +66,9 @@ def can_read(pkg_dict):
 
 
 def get_config_bool_value(config_name, default_value=False):
-    value = tk.config.get(config_name, default_value)
-    value = value if type(value) == bool else value != 'False'
-    return value
+    env_name = config_name.upper().replace('.', '_')
+    value = os.environ.get(env_name, tk.config.get(config_name, default_value))
+    return value if type(value) == bool else value.strip().lower() in ('true', '1', 'on')
 
 
 def show_acquire_url_on_create():
diff --git a/ckanext/privatedatasets/plugin.py b/ckanext/privatedatasets/plugin.py
old mode 100755
new mode 100644