diff --git a/actions/letsencrypt b/actions/letsencrypt
index d7da00e42..5e55598f9 100755
--- a/actions/letsencrypt
+++ b/actions/letsencrypt
@@ -23,11 +23,12 @@ Configuration helper for Let's Encrypt.
 import argparse
 import json
 import os
+import shutil
 import subprocess
 import sys
 import re
+
 import configobj
-import shutil
 
 from plinth import action_utils
 from plinth.modules.config import config
@@ -141,7 +142,7 @@ def get_validity_status(domain):
     output = subprocess.check_output(['certbot', 'certificates', '-d', domain])
     output = output.decode(sys.stdout.encoding)
 
-    match = re.search('INVALID: (.*)\)', output)
+    match = re.search(r'INVALID: (.*)\)', output)
     if match is not None:
         validity = match.group(1).lower()
     elif re.search('VALID', output) is not None:
@@ -194,7 +195,7 @@ def subcommand_revoke(arguments):
 
     process = subprocess.Popen(command, stdout=subprocess.PIPE,
                                stderr=subprocess.PIPE)
-    stdout, stderr = process.communicate()
+    _, stderr = process.communicate()
     if process.returncode:
         print(stderr.decode(), file=sys.stderr)
         sys.exit(1)
@@ -216,7 +217,7 @@ def subcommand_obtain(arguments):
 
     process = subprocess.Popen(command, stdout=subprocess.PIPE,
                                stderr=subprocess.PIPE)
-    stdin, stderr = process.communicate()
+    _, stderr = process.communicate()
     if process.returncode:
         print(stderr.decode(), file=sys.stderr)
         sys.exit(1)
@@ -390,7 +391,7 @@ def subcommand_delete(arguments):
     command = ['certbot', 'delete', '--cert-name', domain]
     process = subprocess.Popen(command, stdout=subprocess.PIPE,
                                stderr=subprocess.PIPE)
-    stdout, stderr = process.communicate()
+    _, stderr = process.communicate()
     if process.returncode:
         print(stderr.decode(), file=sys.stderr)
         sys.exit(1)
diff --git a/plinth/modules/letsencrypt/templates/letsencrypt.html b/plinth/modules/letsencrypt/templates/letsencrypt.html
index 6d5da3d79..47c37b772 100644
--- a/plinth/modules/letsencrypt/templates/letsencrypt.html
+++ b/plinth/modules/letsencrypt/templates/letsencrypt.html
@@ -160,11 +160,11 @@
             {% if status.current_domain.name %}
               {% blocktrans with current_domain=status.current_domain.name %}
                 Let Plinth manage certificate renewal of
-                <b>{{ current_domain }}</b> (recommmended)
+                <b>{{ current_domain }}</b> (recommended)
               {% endblocktrans %}
             {% else %}
               {% blocktrans with current_domain=status.current_domain.name %}
-                Let Plinth manage certificate renewal of the current domain (recommmended)
+                Let Plinth manage certificate renewal of the current domain (recommended)
               {% endblocktrans %}
             {% endif %}
           </span>
diff --git a/plinth/modules/letsencrypt/views.py b/plinth/modules/letsencrypt/views.py
index e86826178..a3b1ea7b5 100644
--- a/plinth/modules/letsencrypt/views.py
+++ b/plinth/modules/letsencrypt/views.py
@@ -19,14 +19,15 @@
 Plinth module for using Let's Encrypt.
 """
 
+import json
+import logging
+
 from django.contrib import messages
 from django.shortcuts import redirect
 from django.template.response import TemplateResponse
 from django.urls import reverse_lazy
 from django.utils.translation import ugettext as _
 from django.views.decorators.http import require_POST
-import json
-import logging
 
 from plinth import actions
 from plinth.errors import ActionError
@@ -138,10 +139,12 @@ def get_status():
     status = actions.superuser_run('letsencrypt', ['get-status'])
     status = json.loads(status)
     curr_dom = config.get_domainname()
-    current_domain = {'name': curr_dom,
-                      'has_cert': curr_dom in status['domains'] and
-                      status['domains'][curr_dom]['certificate_available'],
-                      'manage_hooks_enabled': _hooks_manage_enabled()}
+    current_domain = {
+        'name': curr_dom,
+        'has_cert': (curr_dom in status['domains'] and
+                     status['domains'][curr_dom]['certificate_available']),
+        'manage_hooks_enabled': _hooks_manage_enabled()
+    }
     status['current_domain'] = current_domain
 
     for domain_type, domains in names.domains.items():
@@ -156,10 +159,10 @@ def get_status():
 
 
 def _hooks_manage_enabled():
-        """Return status of hook management for current domain."""
-        try:
-            output = actions.superuser_run('letsencrypt',
-                                           ['manage_hooks', 'status'])
-        except ActionError:
-            return False
-        return output.strip() == 'enabled'
+    """Return status of hook management for current domain."""
+    try:
+        output = actions.superuser_run('letsencrypt',
+                                       ['manage_hooks', 'status'])
+    except ActionError:
+        return False
+    return output.strip() == 'enabled'