diff --git a/bookwyrm/management/commands/generate_preview_images.py b/bookwyrm/management/commands/generate_preview_images.py
index 28ea1c0cb..6ca26b2d3 100644
--- a/bookwyrm/management/commands/generate_preview_images.py
+++ b/bookwyrm/management/commands/generate_preview_images.py
@@ -10,48 +10,55 @@ class Command(BaseCommand):
     help = "Generate preview images"
 
     def add_arguments(self, parser):
-        parser.add_argument('--all', '-a', action="store_true", help="Generates images for ALL types: site, users and books. Can use a lot of computing power.")
+        parser.add_argument(
+            "--all",
+            "-a",
+            action="store_true",
+            help="Generates images for ALL types: site, users and books. Can use a lot of computing power.",
+        )
 
     # pylint: disable=no-self-use,unused-argument
     def handle(self, *args, **options):
         """generate preview images"""
-        self.stdout.write("   | Hello! I will be generating preview images for your instance.")
-        if options['all']:
+        self.stdout.write(
+            "   | Hello! I will be generating preview images for your instance."
+        )
+        if options["all"]:
             self.stdout.write(
                 "🧑‍🎨 ⎨ This might take quite long if your instance has a lot of books and users."
             )
             self.stdout.write("   | ✧ Thank you for your patience ✧")
         else:
-            self.stdout.write(
-                "🧑‍🎨 ⎨ I will only generate the instance preview image."
-            )            
+            self.stdout.write("🧑‍🎨 ⎨ I will only generate the instance preview image.")
             self.stdout.write("   | ✧ Be right back! ✧")
 
         # Site
-        self.stdout.write("   → Site preview image: ", ending='')
+        self.stdout.write("   → Site preview image: ", ending="")
         preview_images.generate_site_preview_image_task.delay()
         self.stdout.write(" OK 🖼")
 
-        if options['all']:
+        if options["all"]:
             # Users
             users = models.User.objects.filter(
                 local=True,
                 is_active=True,
             )
-            self.stdout.write("   → User preview images ({}): ".format(len(users)), ending='')
+            self.stdout.write(
+                "   → User preview images ({}): ".format(len(users)), ending=""
+            )
             for user in users:
                 preview_images.generate_user_preview_image_task.delay(user.id)
-                self.stdout.write(".", ending='')
+                self.stdout.write(".", ending="")
             self.stdout.write(" OK 🖼")
 
             # Books
             books = models.Book.objects.select_subclasses().filter()
-            self.stdout.write("   → Book preview images ({}): ".format(len(books)), ending='')
+            self.stdout.write(
+                "   → Book preview images ({}): ".format(len(books)), ending=""
+            )
             for book in books:
                 preview_images.generate_edition_preview_image_task.delay(book.id)
-                self.stdout.write(".", ending='')
+                self.stdout.write(".", ending="")
             self.stdout.write(" OK 🖼")
 
         self.stdout.write("🧑‍🎨 ⎨ I’m all done! ✧ Enjoy ✧")
-
-
diff --git a/bookwyrm/preview_images.py b/bookwyrm/preview_images.py
index 60b69d0a3..7a23353c8 100644
--- a/bookwyrm/preview_images.py
+++ b/bookwyrm/preview_images.py
@@ -126,11 +126,15 @@ def generate_instance_layer(content_width):
 
 
 def generate_rating_layer(rating, content_width):
-    icon_star_full = Image.open(os.path.join(settings.STATIC_ROOT, "images/icons/star-full.png"))
+    icon_star_full = Image.open(
+        os.path.join(settings.STATIC_ROOT, "images/icons/star-full.png")
+    )
     icon_star_empty = Image.open(
         os.path.join(settings.STATIC_ROOT, "images/icons/star-empty.png")
     )
-    icon_star_half = Image.open(os.path.join(settings.STATIC_ROOT, "images/icons/star-half.png"))
+    icon_star_half = Image.open(
+        os.path.join(settings.STATIC_ROOT, "images/icons/star-half.png")
+    )
 
     icon_size = 64
     icon_margin = 10
@@ -321,7 +325,9 @@ def generate_site_preview_image_task():
             "text_three": site.instance_tagline,
         }
 
-        image = generate_preview_image(texts=texts, picture=logo, show_instance_layer=False)
+        image = generate_preview_image(
+            texts=texts, picture=logo, show_instance_layer=False
+        )
 
         save_and_cleanup(image, instance=site)