diff --git a/cloudkittydashboard/api/cloudkitty.py b/cloudkittydashboard/api/cloudkitty.py
index a980f9a..ef99873 100644
--- a/cloudkittydashboard/api/cloudkitty.py
+++ b/cloudkittydashboard/api/cloudkitty.py
@@ -1,4 +1,3 @@
-# -*- coding: utf-8 -*-
 # Copyright 2015 Objectif Libre
 #
 # Licensed under the Apache License, Version 2.0 (the "License"); you may
diff --git a/cloudkittydashboard/dashboards/admin/hashmap/tables.py b/cloudkittydashboard/dashboards/admin/hashmap/tables.py
index 84805de..0be6a6a 100644
--- a/cloudkittydashboard/dashboards/admin/hashmap/tables.py
+++ b/cloudkittydashboard/dashboards/admin/hashmap/tables.py
@@ -41,16 +41,16 @@ class DeleteService(tables.DeleteAction):
     @staticmethod
     def action_present(count):
         return ngettext_lazy(
-            u"Delete Service",
-            u"Delete Services",
+            "Delete Service",
+            "Delete Services",
             count
         )
 
     @staticmethod
     def action_past(count):
         return ngettext_lazy(
-            u"Deleted Service",
-            u"Deleted Services",
+            "Deleted Service",
+            "Deleted Services",
             count
         )
 
@@ -103,16 +103,16 @@ class DeleteGroup(tables.DeleteAction):
     @staticmethod
     def action_present(count):
         return ngettext_lazy(
-            u"Delete Group",
-            u"Delete Groups",
+            "Delete Group",
+            "Delete Groups",
             count
         )
 
     @staticmethod
     def action_past(count):
         return ngettext_lazy(
-            u"Deleted Group",
-            u"Deleted Groups",
+            "Deleted Group",
+            "Deleted Groups",
             count
         )
 
@@ -190,16 +190,16 @@ class DeleteServiceThreshold(tables.DeleteAction):
     @staticmethod
     def action_present(count):
         return ngettext_lazy(
-            u"Delete Service Threshold",
-            u"Delete Service Thresholds",
+            "Delete Service Threshold",
+            "Delete Service Thresholds",
             count
         )
 
     @staticmethod
     def action_past(count):
         return ngettext_lazy(
-            u"Deleted Service Threshold",
-            u"Deleted Service Thresholds",
+            "Deleted Service Threshold",
+            "Deleted Service Thresholds",
             count
         )
 
@@ -217,16 +217,16 @@ class DeleteFieldThreshold(tables.DeleteAction):
     @staticmethod
     def action_present(count):
         return ngettext_lazy(
-            u"Delete Field Threshold",
-            u"Delete Field Thresholds",
+            "Delete Field Threshold",
+            "Delete Field Thresholds",
             count
         )
 
     @staticmethod
     def action_past(count):
         return ngettext_lazy(
-            u"Deleted Field Threshold",
-            u"Deleted Field Thresholds",
+            "Deleted Field Threshold",
+            "Deleted Field Thresholds",
             count
         )
 
@@ -357,16 +357,16 @@ class DeleteField(tables.DeleteAction):
     @staticmethod
     def action_present(count):
         return ngettext_lazy(
-            u"Delete Field",
-            u"Delete Fields",
+            "Delete Field",
+            "Delete Fields",
             count
         )
 
     @staticmethod
     def action_past(count):
         return ngettext_lazy(
-            u"Deleted Field",
-            u"Deleted Fields",
+            "Deleted Field",
+            "Deleted Fields",
             count
         )
 
@@ -429,16 +429,16 @@ class DeleteMapping(tables.DeleteAction):
     @staticmethod
     def action_present(count):
         return ngettext_lazy(
-            u"Delete Mapping",
-            u"Delete Mappings",
+            "Delete Mapping",
+            "Delete Mappings",
             count
         )
 
     @staticmethod
     def action_past(count):
         return ngettext_lazy(
-            u"Deleted Mapping",
-            u"Deleted Mappings",
+            "Deleted Mapping",
+            "Deleted Mappings",
             count
         )
 
diff --git a/cloudkittydashboard/dashboards/admin/modules/tables.py b/cloudkittydashboard/dashboards/admin/modules/tables.py
index ee194b3..5c9ab75 100644
--- a/cloudkittydashboard/dashboards/admin/modules/tables.py
+++ b/cloudkittydashboard/dashboards/admin/modules/tables.py
@@ -47,13 +47,13 @@ class ToggleEnabledModule(tables.BatchAction):
     def action_present(count):
         return (
             ngettext_lazy(
-                u"Enable Module",
-                u"Enable Modules",
+                "Enable Module",
+                "Enable Modules",
                 count
             ),
             ngettext_lazy(
-                u"Disable Module",
-                u"Disable Modules",
+                "Disable Module",
+                "Disable Modules",
                 count
             ),
         )
@@ -62,13 +62,13 @@ class ToggleEnabledModule(tables.BatchAction):
     def action_past(count):
         return (
             ngettext_lazy(
-                u"Enabled Module",
-                u"Enabled Modules",
+                "Enabled Module",
+                "Enabled Modules",
                 count
             ),
             ngettext_lazy(
-                u"Disabled Module",
-                u"Disabled Modules",
+                "Disabled Module",
+                "Disabled Modules",
                 count
             ),
         )
diff --git a/cloudkittydashboard/dashboards/admin/pyscripts/tables.py b/cloudkittydashboard/dashboards/admin/pyscripts/tables.py
index 76a9331..bede7e3 100644
--- a/cloudkittydashboard/dashboards/admin/pyscripts/tables.py
+++ b/cloudkittydashboard/dashboards/admin/pyscripts/tables.py
@@ -56,16 +56,16 @@ class DeletePyScript(tables.DeleteAction):
     @staticmethod
     def action_present(count):
         return ngettext_lazy(
-            u"Delete PyScript",
-            u"Delete PyScripts",
+            "Delete PyScript",
+            "Delete PyScripts",
             count
         )
 
     @staticmethod
     def action_past(count):
         return ngettext_lazy(
-            u"Deleted PyScript",
-            u"Deleted PyScripts",
+            "Deleted PyScript",
+            "Deleted PyScripts",
             count
         )
 
diff --git a/cloudkittydashboard/tests/base.py b/cloudkittydashboard/tests/base.py
index 1c30cdb..2159808 100644
--- a/cloudkittydashboard/tests/base.py
+++ b/cloudkittydashboard/tests/base.py
@@ -1,5 +1,3 @@
-# -*- coding: utf-8 -*-
-
 # Copyright 2010-2011 OpenStack Foundation
 # Copyright (c) 2013 Hewlett-Packard Development Company, L.P.
 #
diff --git a/cloudkittydashboard/tests/test_cloudkittydashboard.py b/cloudkittydashboard/tests/test_cloudkittydashboard.py
index 3e066ed..4a97355 100644
--- a/cloudkittydashboard/tests/test_cloudkittydashboard.py
+++ b/cloudkittydashboard/tests/test_cloudkittydashboard.py
@@ -1,6 +1,5 @@
-# -*- coding: utf-8 -*-
 # Copyright 2015 Objectif Libre
-
+#
 # Licensed under the Apache License, Version 2.0 (the "License"); you may
 # not use this file except in compliance with the License. You may obtain
 # a copy of the License at
diff --git a/cloudkittydashboard/utils.py b/cloudkittydashboard/utils.py
index 95fd3d4..d39eac7 100644
--- a/cloudkittydashboard/utils.py
+++ b/cloudkittydashboard/utils.py
@@ -1,4 +1,3 @@
-# -*- coding: utf-8 -*-
 # Copyright 2018 Objectif Libre
 #
 # Licensed under the Apache License, Version 2.0 (the "License"); you may
diff --git a/doc/source/conf.py b/doc/source/conf.py
index 3285d2e..420ec14 100644
--- a/doc/source/conf.py
+++ b/doc/source/conf.py
@@ -1,4 +1,3 @@
-# -*- coding: utf-8 -*-
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
 # You may obtain a copy of the License at
diff --git a/doc/source/installation.rst b/doc/source/installation.rst
index cde4505..1cd37c9 100644
--- a/doc/source/installation.rst
+++ b/doc/source/installation.rst
@@ -72,5 +72,5 @@ Some symbols (Such as Non-ASCII) might require to use unicode value directly.
 .. code-block:: python
 
    # British Pound
-   OPENSTACK_CLOUDKITTY_RATE_PREFIX = u'\xA3'
+   OPENSTACK_CLOUDKITTY_RATE_PREFIX = '\xA3'
    OPENSTACK_CLOUDKITTY_RATE_POSTFIX = 'GBP'
diff --git a/releasenotes/source/conf.py b/releasenotes/source/conf.py
index aef7bea..c4ecdc1 100644
--- a/releasenotes/source/conf.py
+++ b/releasenotes/source/conf.py
@@ -1,5 +1,3 @@
-# -*- coding: utf-8 -*-
-#
 # Cloudkitty Release Notes documentation build configuration file.
 #
 # This file is execfile()d with the current directory set to its