diff --git a/packages/checkfile/lektor_checkfile.py b/packages/checkfile/lektor_checkfile.py
index a7c595815..79738f70e 100644
--- a/packages/checkfile/lektor_checkfile.py
+++ b/packages/checkfile/lektor_checkfile.py
@@ -1,11 +1,14 @@
 # -*- coding: utf-8 -*-
+# Standard library
 import os
+
+# Third-party
 from lektor.pluginsystem import Plugin
 
 
 class CheckfilePlugin(Plugin):
     name = "CheckFile"
-    description = u"Plugin to check if a file is present."
+    description = "Plugin to check if a file is present."
 
     def on_setup_env(self, **extra):
         def check_file(filename):
diff --git a/packages/checkfile/setup.py b/packages/checkfile/setup.py
index 2e3ef30f0..f4add79dc 100644
--- a/packages/checkfile/setup.py
+++ b/packages/checkfile/setup.py
@@ -1,8 +1,10 @@
+# Standard library
 import ast
 import io
 import re
 
-from setuptools import setup, find_packages
+# Third-party
+from setuptools import find_packages, setup
 
 with io.open("README.md", "rt", encoding="utf8") as f:
     readme = f.read()
@@ -35,6 +37,8 @@
         "Programming Language :: Python :: 3",
     ],
     entry_points={
-        "lektor.plugins": ["checkfile = lektor_checkfile:CheckfilePlugin",]  # noqa: E231, E501
+        "lektor.plugins": [
+            "checkfile = lektor_checkfile:CheckfilePlugin",
+        ]
     },
 )
diff --git a/packages/markdown-table/lektor_markdown_table.py b/packages/markdown-table/lektor_markdown_table.py
index b52493766..2e084e617 100644
--- a/packages/markdown-table/lektor_markdown_table.py
+++ b/packages/markdown-table/lektor_markdown_table.py
@@ -1,4 +1,5 @@
 # -*- coding: utf-8 -*-
+# Third-party
 from lektor.pluginsystem import Plugin
 
 
diff --git a/packages/markdown-table/setup.py b/packages/markdown-table/setup.py
index 65f471183..f3b41bf1b 100644
--- a/packages/markdown-table/setup.py
+++ b/packages/markdown-table/setup.py
@@ -1,6 +1,8 @@
-from setuptools import setup, find_packages
+# Standard library
 from os import path
 
+# Third-party
+from setuptools import find_packages, setup
 
 this_directory = path.abspath(path.dirname(__file__))
 with open(path.join(this_directory, "README.md"), encoding="utf-8") as f: