diff --git a/muk_utils/__manifest__.py b/muk_utils/__manifest__.py
index bade4e6..b9ae057 100644
--- a/muk_utils/__manifest__.py
+++ b/muk_utils/__manifest__.py
@@ -20,7 +20,7 @@
 {
     "name": "MuK Utils",
     "summary": """Utility Features""",
-    "version": '11.0.1.0.15',   
+    "version": '11.0.1.0.16',   
     "category": 'Extra Tools',   
     "license": "AGPL-3",
     "website": "https://www.mukit.at",
diff --git a/muk_utils/models/res_groups.py b/muk_utils/models/res_groups.py
index e539a94..32298ac 100644
--- a/muk_utils/models/res_groups.py
+++ b/muk_utils/models/res_groups.py
@@ -62,7 +62,7 @@ class ResGroups(models.Model):
             model = self.env[model_name].sudo()
             if not model._abstract:
                 model_recs[model_name] = model.search([['groups', 'in', self.mapped('id')]])
-        result = super(ResGroups, self).unlink()
+        result = super(ResGroups, self).unlink(vals)
         for tuple in model_recs.items():
             tuple[1].trigger_computation(['users'])
-        return result
+        return result
\ No newline at end of file
diff --git a/muk_utils/tools/helper.py b/muk_utils/tools/helper.py
index 1810483..c35663f 100644
--- a/muk_utils/tools/helper.py
+++ b/muk_utils/tools/helper.py
@@ -1,55 +1,54 @@
-###################################################################################
-# 
-#    Copyright (C) 2018 MuK IT GmbH
-#
-#    This program is free software: you can redistribute it and/or modify
-#    it under the terms of the GNU Affero General Public License as
-#    published by the Free Software Foundation, either version 3 of the
-#    License, or (at your option) any later version.
-#
-#    This program is distributed in the hope that it will be useful,
-#    but WITHOUT ANY WARRANTY; without even the implied warranty of
-#    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-#    GNU Affero General Public License for more details.
-#
-#    You should have received a copy of the GNU Affero General Public License
-#    along with this program.  If not, see <http://www.gnu.org/licenses/>.
-#
-###################################################################################
-
-import re
-import sys
-import time
-import logging
-import unicodedata
-
-_logger = logging.getLogger(__name__)
-
-#----------------------------------------------------------
-# Functions
-#----------------------------------------------------------
-
-def slugify(value):
-    value = str(unicodedata.normalize('NFKD', value))
-    if sys.version_info < (3,):
-        value = str(value.encode('ascii', 'ignore'))
-    value = str(re.sub('[^\w\s-]', '', value).strip().lower())
-    value = str(re.sub('[-\s]+', '-', value))
-    return value
-
-#----------------------------------------------------------
-# Decorators
-#----------------------------------------------------------
-
-def timeout(func, delay=30):
-    def wrapper(*args, **kwargs):
-        if args[0]._name in wrapper.timeouts:
-            timeout = wrapper.timeouts[args[0]._name]
-            if time.time() > timeout + delay:
-                wrapper.timeouts[args[0]._name] = time.time()
-                return func(*args, **kwargs)
-        else:
-            wrapper.timeouts[args[0]._name] = time.time()
-            return func(*args, **kwargs)
-    wrapper.timeouts = {}
+###################################################################################
+# 
+#    Copyright (C) 2018 MuK IT GmbH
+#
+#    This program is free software: you can redistribute it and/or modify
+#    it under the terms of the GNU Affero General Public License as
+#    published by the Free Software Foundation, either version 3 of the
+#    License, or (at your option) any later version.
+#
+#    This program is distributed in the hope that it will be useful,
+#    but WITHOUT ANY WARRANTY; without even the implied warranty of
+#    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+#    GNU Affero General Public License for more details.
+#
+#    You should have received a copy of the GNU Affero General Public License
+#    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+#
+###################################################################################
+
+import re
+import sys
+import time
+import logging
+import unicodedata
+
+_logger = logging.getLogger(__name__)
+
+#----------------------------------------------------------
+# Functions
+#----------------------------------------------------------
+
+def slugify(value):
+    value = str(unicodedata.normalize('NFKD', value))
+    value = str(value.encode('ascii', 'ignore'))
+    value = str(re.sub('[^\w\s-]', '', value).strip().lower())
+    value = str(re.sub('[-\s]+', '-', value))
+    return value
+
+#----------------------------------------------------------
+# Decorators
+#----------------------------------------------------------
+
+def timeout(func, delay=30):
+    def wrapper(*args, **kwargs):
+        if args[0]._name in wrapper.timeouts:
+            timeout = wrapper.timeouts[args[0]._name]
+            if time.time() > timeout + delay:
+                wrapper.timeouts[args[0]._name] = time.time()
+                return func(*args, **kwargs)
+        else:
+            wrapper.timeouts[args[0]._name] = time.time()
+            return func(*args, **kwargs)
+    wrapper.timeouts = {}
     return wrapper
\ No newline at end of file