diff --git a/mayan/apps/common/compat.py b/mayan/apps/common/compat.py
index c32809b770..fb0d6a0dcf 100644
--- a/mayan/apps/common/compat.py
+++ b/mayan/apps/common/compat.py
@@ -21,4 +21,4 @@ try:
 except NameError:
     FileNotFoundErrorException = IOError
 else:
-    FileNotFoundErrorException = FileNotFoundError
+    FileNotFoundErrorException = FileNotFoundError  # NOQA
diff --git a/mayan/apps/common/utils.py b/mayan/apps/common/utils.py
index ed5ebef593..7c0f57b06b 100644
--- a/mayan/apps/common/utils.py
+++ b/mayan/apps/common/utils.py
@@ -12,9 +12,8 @@ from django.utils.datastructures import MultiValueDict
 from django.utils.http import (
     urlencode as django_urlencode, urlquote as django_urlquote
 )
-from django.utils.six.moves import reduce as reduce_function, xmlrpc_client
+from django.utils.six.moves import reduce as reduce_function
 
-import mayan
 from mayan.apps.common.compat import dict_type, dictionary_type
 
 from .literals import DJANGO_SQLITE_BACKEND
diff --git a/mayan/apps/converter/apps.py b/mayan/apps/converter/apps.py
index 3cc4e93601..af8a668c6f 100644
--- a/mayan/apps/converter/apps.py
+++ b/mayan/apps/converter/apps.py
@@ -8,7 +8,6 @@ from mayan.apps.common.menus import menu_object, menu_secondary
 from mayan.apps.navigation.classes import SourceColumn
 
 from .dependencies import *  # NOQA
-from .classes import libreoffice_path
 from .links import (
     link_transformation_create, link_transformation_delete,
     link_transformation_edit
diff --git a/mayan/apps/converter/backends/python.py b/mayan/apps/converter/backends/python.py
index 811d1ed29b..aa13aea99c 100644
--- a/mayan/apps/converter/backends/python.py
+++ b/mayan/apps/converter/backends/python.py
@@ -56,7 +56,7 @@ else:
 
     pdftoppm = pdftoppm.bake(pdftoppm_format, '-r', pdftoppm_dpi)
 
-pdfinfo_path=yaml.load(
+pdfinfo_path = yaml.load(
     stream=setting_graphics_backend_config.value, Loader=SafeLoader
 ).get(
     'pdfinfo_path', DEFAULT_PDFINFO_PATH
diff --git a/mayan/apps/document_states/apps.py b/mayan/apps/document_states/apps.py
index 26811a92de..e843c04b09 100644
--- a/mayan/apps/document_states/apps.py
+++ b/mayan/apps/document_states/apps.py
@@ -92,7 +92,6 @@ class DocumentStatesApp(MayanAppConfig):
 
         WorkflowAction.initialize()
 
-
         ModelAttribute(
             model=Document,
             name='workflow.< workflow internal name >.get_current_state',
diff --git a/mayan/apps/file_metadata/dependencies.py b/mayan/apps/file_metadata/dependencies.py
index 999a7d9362..b3cb18acdf 100644
--- a/mayan/apps/file_metadata/dependencies.py
+++ b/mayan/apps/file_metadata/dependencies.py
@@ -2,7 +2,7 @@ from __future__ import unicode_literals
 
 from django.utils.translation import ugettext_lazy as _
 
-from mayan.apps.dependencies.classes import BinaryDependency, PythonDependency
+from mayan.apps.dependencies.classes import BinaryDependency
 
 from .drivers.exiftool import EXIFToolDriver
 
diff --git a/mayan/apps/file_metadata/drivers/exiftool.py b/mayan/apps/file_metadata/drivers/exiftool.py
index 0c0f12101b..826a1e7296 100644
--- a/mayan/apps/file_metadata/drivers/exiftool.py
+++ b/mayan/apps/file_metadata/drivers/exiftool.py
@@ -66,7 +66,6 @@ class EXIFToolDriver(FileMetadataDriver):
         ).get('exiftool_path', DEFAULT_EXIF_PATH)
 
 
-
 EXIFToolDriver.register(
     mimetypes=(
         'application/msword',
diff --git a/mayan/apps/metadata/apps.py b/mayan/apps/metadata/apps.py
index d9ee737fc5..7aeaf617db 100644
--- a/mayan/apps/metadata/apps.py
+++ b/mayan/apps/metadata/apps.py
@@ -29,7 +29,7 @@ from mayan.celery import app
 from mayan.apps.navigation.classes import SourceColumn
 
 from .classes import DocumentMetadataHelper
-from .dependencies import *  #NOQA
+from .dependencies import *  # NOQA
 from .events import (
     event_document_metadata_added, event_document_metadata_edited,
     event_document_metadata_removed, event_metadata_type_edited,
@@ -153,7 +153,6 @@ class MetadataApp(MayanAppConfig):
             )
         )
 
-
         SourceColumn(
             source=Document, label=_('Metadata'),
             func=lambda context: get_metadata_string(context['object'])