diff --git a/amanuensis/backend/index.py b/amanuensis/backend/index.py
index fc988cc..e1a64be 100644
--- a/amanuensis/backend/index.py
+++ b/amanuensis/backend/index.py
@@ -78,7 +78,11 @@ def create(
 
 def get_for_lexicon(db: DbContext, lexicon_id: int) -> Sequence[ArticleIndex]:
     """Returns all index rules for a lexicon."""
-    return db(select(ArticleIndex).where(ArticleIndex.lexicon_id == lexicon_id)).scalars()
+    return db(
+        select(ArticleIndex).where(ArticleIndex.lexicon_id == lexicon_id)
+    ).scalars()
+
+
 
 def update(db: DbContext, lexicon_id: int, indices: Sequence[ArticleIndex]) -> None:
     """
@@ -92,7 +96,10 @@ def update(db: DbContext, lexicon_id: int, indices: Sequence[ArticleIndex]) -> N
     for extant_index in extant_indices:
         match = None
         for new_index in indices:
-            is_match = extant_index.index_type == new_index.index_type and extant_index.pattern == new_index.pattern
+            is_match = (
+                extant_index.index_type == new_index.index_type
+                and extant_index.pattern == new_index.pattern
+            )
             if is_match:
                 match = new_index
                 break
@@ -105,7 +112,10 @@ def update(db: DbContext, lexicon_id: int, indices: Sequence[ArticleIndex]) -> N
     for new_index in indices:
         match = None
         for extant_index in extant_indices:
-            is_match = extant_index.index_type == new_index.index_type and extant_index.pattern == new_index.pattern
+            is_match = (
+                extant_index.index_type == new_index.index_type
+                and extant_index.pattern == new_index.pattern
+            )
             if is_match:
                 match = extant_index
                 break
diff --git a/amanuensis/cli/index.py b/amanuensis/cli/index.py
index 000508a..3b09df0 100644
--- a/amanuensis/cli/index.py
+++ b/amanuensis/cli/index.py
@@ -12,8 +12,11 @@ COMMAND_HELP = "Interact with indexes."
 
 LOG = logging.getLogger(__name__)
 
+
 @add_argument("--lexicon", required=True)
-@add_argument("--type", required=True, type=lambda s: IndexType[s.upper()], choices=IndexType)
+@add_argument(
+    "--type", required=True, type=lambda s: IndexType[s.upper()], choices=IndexType
+)
 @add_argument("--pattern", required=True)
 @add_argument("--logical", type=int, default=0)
 @add_argument("--display", type=int, default=0)
@@ -27,7 +30,13 @@ def command_create(args) -> int:
     if not lexicon:
         raise ValueError("Lexicon does not exist")
     index: ArticleIndex = indq.create(
-        db, lexicon.id, args.type, args.pattern, args.logical, args.display, args.capacity
+        db,
+        lexicon.id,
+        args.type,
+        args.pattern,
+        args.logical,
+        args.display,
+        args.capacity,
     )
     LOG.info(f"Created {index.index_type}:{index.pattern} in {lexicon.full_title}")
     return 0
diff --git a/amanuensis/server/lexicon/settings/__init__.py b/amanuensis/server/lexicon/settings/__init__.py
index fbf13b2..26b4558 100644
--- a/amanuensis/server/lexicon/settings/__init__.py
+++ b/amanuensis/server/lexicon/settings/__init__.py
@@ -137,13 +137,15 @@ def index(lexicon_name):
         for index in indices
     ]
     # Add a blank index to allow for adding rules
-    index_data.append({
-        "index_type": "",
-        "pattern": None,
-        "logical_order": None,
-        "display_order": None,
-        "capacity": None,
-    })
+    index_data.append(
+        {
+            "index_type": "",
+            "pattern": None,
+            "logical_order": None,
+            "display_order": None,
+            "capacity": None,
+        }
+    )
     form = IndexSchemaForm(indices=index_data)
     return render_template(
         "settings.jinja", lexicon_name=lexicon_name, page_name=index.__name__, form=form
@@ -167,7 +169,12 @@ def index_post(lexicon_name):
         return redirect(url_for("lexicon.settings.index", lexicon_name=lexicon_name))
     else:
         # Invalid data
-        return render_template("settings.jinja", lexicon_name=lexicon_name, page_name=index.__name__, form=form)
+        return render_template(
+            "settings.jinja",
+            lexicon_name=lexicon_name,
+            page_name=index.__name__,
+            form=form,
+        )
 
 
 @bp.get("/publish/")
diff --git a/amanuensis/server/lexicon/settings/forms.py b/amanuensis/server/lexicon/settings/forms.py
index 74c424f..7b9209c 100644
--- a/amanuensis/server/lexicon/settings/forms.py
+++ b/amanuensis/server/lexicon/settings/forms.py
@@ -64,12 +64,16 @@ class IndexDefinitionForm(FlaskForm):
         # form will have one
         csrf = False
 
-    TYPE_CHOICES = ([("", "")] + [(str(t), str(t).lower()) for t in IndexType])
+    TYPE_CHOICES = [("", "")] + [(str(t), str(t).lower()) for t in IndexType]
 
     index_type = SelectField(choices=TYPE_CHOICES, coerce=parse_index_type)
     pattern = StringField()
-    logical_order = IntegerField(widget=NumberInput(min=-99, max=99), validators=[Optional()])
-    display_order = IntegerField(widget=NumberInput(min=-99, max=99), validators=[Optional()])
+    logical_order = IntegerField(
+        widget=NumberInput(min=-99, max=99), validators=[Optional()]
+    )
+    display_order = IntegerField(
+        widget=NumberInput(min=-99, max=99), validators=[Optional()]
+    )
     capacity = IntegerField(widget=NumberInput(min=0, max=99), validators=[Optional()])
 
     def validate_pattern(form, field):