diff --git a/feeds.py b/feeds.py
index 425933b1..747d2f0b 100644
--- a/feeds.py
+++ b/feeds.py
@@ -66,7 +66,7 @@ def __call__(self, request, *args, **kwargs):
     __name__ = 'package_feed'
 
     def get_object(self, request, arch='', repo=''):
-        obj = dict()
+        obj = {}
         qs = Package.objects.normal().order_by('-last_update')
 
         if arch != '':
@@ -99,10 +99,11 @@ def get_object(self, request, arch='', repo=''):
 
     def title(self, obj):
         s = 'Arch Linux: Recent package updates'
-        fields = dict(
-            arch=obj['arch'].name if 'arch' in obj else None,
-            repo='[%s]' % obj['repo'].name.lower() if 'repo' in obj else None,
-            repos=obj['repos'].name if 'repos' in obj else None,)
+        fields = {
+            'arch': obj['arch'].name if 'arch' in obj else None,
+            'repo': '[%s]' % obj['repo'].name.lower() if 'repo' in obj else None,
+            'repos': obj['repos'].name if 'repos' in obj else None
+        }
 
         if fields['arch']:
             if fields['repo']:
@@ -123,10 +124,11 @@ def title(self, obj):
     def description(self, obj):
         s = 'Recently updated packages'
 
-        fields = dict(
-            arch=obj['arch'].name if 'arch' in obj else None,
-            repo='[%s]' % obj['repo'].name.lower() if 'repo' in obj else None,
-            repos=', '.join(['[%s]' % r.name.lower() for r in obj['repos'].all()]) if 'repos' in obj else None,)
+        fields = {
+            'arch': obj['arch'].name if 'arch' in obj else None,
+            'repo': '[%s]' % obj['repo'].name.lower() if 'repo' in obj else None,
+            'repos': ', '.join(['[%s]' % r.name.lower() for r in obj['repos'].all()]) if 'repos' in obj else None
+        }
 
         if fields['arch']:
             s += ' for the \'%(arch)s\' architecture'
@@ -186,7 +188,7 @@ def __call__(self, request, *args, **kwargs):
     __name__ = 'packages_updates_feed'
 
     def get_object(self, request, operation='', arch='', repo=''):
-        obj = dict()
+        obj = {}
 
         if 'added' in request.path:
             flag = ADDITION
@@ -229,10 +231,11 @@ def get_object(self, request, operation='', arch='', repo=''):
     def title(self, obj):
         s = 'Arch Linux: Recently %(action)s packages' % obj
 
-        fields = dict(
-            arch=obj['arch'].name if 'arch' in obj else None,
-            repo='[%s]' % obj['repo'].name.lower() if 'repo' in obj else None,
-            repos=obj['repos'].name if 'repos' in obj else None,)
+        fields = {
+            'arch': obj['arch'].name if 'arch' in obj else None,
+            'repo': '[%s]' % obj['repo'].name.lower() if 'repo' in obj else None,
+            'repos': obj['repos'].name if 'repos' in obj else None
+        }
 
         if fields['arch']:
             if fields['repo']:
@@ -253,10 +256,11 @@ def title(self, obj):
     def description(self, obj):
         s = 'Recently %(action)s packages' % obj
 
-        fields = dict(
-            arch=obj['arch'].name if 'arch' in obj else None,
-            repo='[%s]' % obj['repo'].name.lower() if 'repo' in obj else None,
-            repos=', '.join(['[%s]' % r.name.lower() for r in obj['repos'].all()]) if 'repos' in obj else None,)
+        fields = {
+            'arch': obj['arch'].name if 'arch' in obj else None,
+            'repo': '[%s]' % obj['repo'].name.lower() if 'repo' in obj else None,
+            'repos': ', '.join(['[%s]' % r.name.lower() for r in obj['repos'].all()]) if 'repos' in obj else None
+        }
 
         if fields['arch']:
             s += ' for the \'%(arch)s\' architecture'
diff --git a/main/migrations/0001_initial.py b/main/migrations/0001_initial.py
index cf9b48f6..e17bdd6a 100644
--- a/main/migrations/0001_initial.py
+++ b/main/migrations/0001_initial.py
@@ -113,6 +113,6 @@ class Migration(migrations.Migration):
         ),
         migrations.AlterUniqueTogether(
             name='package',
-            unique_together=set([('pkgname', 'repo', 'arch')]),
+            unique_together={('pkgname', 'repo', 'arch')},
         ),
     ]
diff --git a/news/views.py b/news/views.py
index 778deea8..8cda9655 100644
--- a/news/views.py
+++ b/news/views.py
@@ -43,7 +43,7 @@ def form_valid(self, form):
             ctx = {
                 'news': newsitem,
             }
-            headers = dict()
+            headers = {}
             if settings.MAILMAN_PASSWORD:
                 headers['Approved'] = settings.MAILMAN_PASSWORD
             template = loader.get_template('news/news_email_notification.txt')
diff --git a/packages/migrations/0001_squashed_0003_auto_20170524_0704.py b/packages/migrations/0001_squashed_0003_auto_20170524_0704.py
index a9131139..354b0abd 100644
--- a/packages/migrations/0001_squashed_0003_auto_20170524_0704.py
+++ b/packages/migrations/0001_squashed_0003_auto_20170524_0704.py
@@ -186,6 +186,6 @@ class Migration(migrations.Migration):
         ),
         migrations.AlterUniqueTogether(
             name='packagerelation',
-            unique_together=set([('pkgbase', 'user', 'type')]),
+            unique_together=[('pkgbase', 'user', 'type')],
         ),
     ]
diff --git a/packages/tests/test_views.py b/packages/tests/test_views.py
index d1c086f2..ffdd9af8 100644
--- a/packages/tests/test_views.py
+++ b/packages/tests/test_views.py
@@ -24,7 +24,7 @@ def test_reponame(client, package):
 
     data = response.json()
     assert len(data['results']) == 5
-    assert set([r['pkgname'] for r in data['results']]) == {"coreutils", "glibc", "linux", "pacman", "systemd"}
+    assert {r['pkgname'] for r in data['results']} == {"coreutils", "glibc", "linux", "pacman", "systemd"}
 
 
 def test_packagename(client, package):
diff --git a/packages/views/flag.py b/packages/views/flag.py
index 987b295b..0564f38c 100644
--- a/packages/views/flag.py
+++ b/packages/views/flag.py
@@ -70,8 +70,7 @@ def flag(request, name, repo, arch):
             flagged_pkgs = list(pkgs)
 
             # find a common version if there is one available to store
-            versions = set((pkg.pkgver, pkg.pkgrel, pkg.epoch)
-                           for pkg in flagged_pkgs)
+            versions = {(pkg.pkgver, pkg.pkgrel, pkg.epoch) for pkg in flagged_pkgs}
             if len(versions) == 1:
                 version = versions.pop()
             else:
diff --git a/ruff.toml b/ruff.toml
index c038ab69..1ae0f746 100644
--- a/ruff.toml
+++ b/ruff.toml
@@ -1,4 +1,5 @@
 select = [
+    "C4",      # flake8-comprehensions
     "E",       # pycodestyle
     "F",       # pyflakes
 ]
diff --git a/todolists/migrations/0001_squashed_0002_remove_todolist_old_id.py b/todolists/migrations/0001_squashed_0002_remove_todolist_old_id.py
index 4acb0fe5..6cdb7e92 100644
--- a/todolists/migrations/0001_squashed_0002_remove_todolist_old_id.py
+++ b/todolists/migrations/0001_squashed_0002_remove_todolist_old_id.py
@@ -57,7 +57,7 @@ class Migration(migrations.Migration):
         ),
         migrations.AlterUniqueTogether(
             name='todolistpackage',
-            unique_together=set([('todolist', 'pkgname', 'arch')]),
+            unique_together=[('todolist', 'pkgname', 'arch')],
         ),
         migrations.RemoveField(
             model_name='todolist',