diff --git a/lnbits/core/crud.py b/lnbits/core/crud.py
index 2c0c5c3d5..2c91bc22a 100644
--- a/lnbits/core/crud.py
+++ b/lnbits/core/crud.py
@@ -286,7 +286,11 @@ async def create_payment(
 
 async def update_payment_status(checking_id: str, pending: bool) -> None:
     await db.execute(
-        "UPDATE apipayments SET pending = ? WHERE checking_id = ?", (int(pending), checking_id,),
+        "UPDATE apipayments SET pending = ? WHERE checking_id = ?",
+        (
+            int(pending),
+            checking_id,
+        ),
     )
 
 
diff --git a/lnbits/extensions/offlineshop/crud.py b/lnbits/extensions/offlineshop/crud.py
index 2d9376dd0..5da350a5e 100644
--- a/lnbits/extensions/offlineshop/crud.py
+++ b/lnbits/extensions/offlineshop/crud.py
@@ -34,12 +34,20 @@ async def get_or_create_shop_by_wallet(wallet: str) -> Optional[Shop]:
 
 async def set_wordlist(shop: int, wordlist: str) -> Optional[Shop]:
     await db.execute(
-        "UPDATE shops SET wordlist = ? WHERE id = ?", (wordlist, shop),
+        "UPDATE shops SET wordlist = ? WHERE id = ?",
+        (wordlist, shop),
     )
     return await get_shop(shop)
 
 
-async def add_item(shop: int, name: str, description: str, image: Optional[str], price: int, unit: str,) -> int:
+async def add_item(
+    shop: int,
+    name: str,
+    description: str,
+    image: Optional[str],
+    price: int,
+    unit: str,
+) -> int:
     result = await db.execute(
         """
         INSERT INTO items (shop, name, description, image, price, unit)
@@ -51,7 +59,13 @@ async def add_item(shop: int, name: str, description: str, image: Optional[str],
 
 
 async def update_item(
-    shop: int, item_id: int, name: str, description: str, image: Optional[str], price: int, unit: str,
+    shop: int,
+    item_id: int,
+    name: str,
+    description: str,
+    image: Optional[str],
+    price: int,
+    unit: str,
 ) -> int:
     await db.execute(
         """
diff --git a/lnbits/extensions/offlineshop/templates/offlineshop/_api_docs.html b/lnbits/extensions/offlineshop/templates/offlineshop/_api_docs.html
index f0d4a151a..1e3bf0519 100644
--- a/lnbits/extensions/offlineshop/templates/offlineshop/_api_docs.html
+++ b/lnbits/extensions/offlineshop/templates/offlineshop/_api_docs.html
@@ -8,20 +8,35 @@
     <q-card-section>
       <ol>
         <li>Register items.</li>
-        <li>Print QR codes and paste them on your store, your menu, somewhere, somehow.</li>
-        <li>Clients scan the QR codes and get information about the items plus the price on their phones directly (they must have internet)</li>
-        <li>Once they decide to pay, they'll get an invoice on their phones automatically</li>
-    <li>When the payment is confirmed, a confirmation code will be issued for them.</li>
+        <li>
+          Print QR codes and paste them on your store, your menu, somewhere,
+          somehow.
+        </li>
+        <li>
+          Clients scan the QR codes and get information about the items plus the
+          price on their phones directly (they must have internet)
+        </li>
+        <li>
+          Once they decide to pay, they'll get an invoice on their phones
+          automatically
+        </li>
+        <li>
+          When the payment is confirmed, a confirmation code will be issued for
+          them.
+        </li>
       </ol>
       <p>
-        The confirmation codes are words from a predefined sequential word list. Each new payment bumps the words sequence by 1. So you can check the confirmation codes manually by just looking at them.
+        The confirmation codes are words from a predefined sequential word list.
+        Each new payment bumps the words sequence by 1. So you can check the
+        confirmation codes manually by just looking at them.
       </p>
       <p>
-        For example, if your wordlist is <code>[apple, banana, coconut]</code> the first purchase will be <code>apple</code>, the second <code>banana</code> and so on. When it gets to the end it starts from the beginning again.
-      </p>
-      <p>
-    Powered by LNURL-pay.
+        For example, if your wordlist is
+        <code>[apple, banana, coconut]</code> the first purchase will be
+        <code>apple</code>, the second <code>banana</code> and so on. When it
+        gets to the end it starts from the beginning again.
       </p>
+      <p>Powered by LNURL-pay.</p>
     </q-card-section>
   </q-card>
 </q-expansion-item>
@@ -51,8 +66,8 @@
           }}/offlineshop/api/v1/offlineshop/items -H "Content-Type:
           application/json" -H "X-Api-Key: {{ g.user.wallets[0].inkey }}" -d
           '{"name": &lt;string&gt;, "description": &lt;string&gt;, "image":
-          &lt;data-uri string&gt;, "price": &lt;integer&gt;, "unit": &lt;"sat" or
-          "USD"&gt;}'
+          &lt;data-uri string&gt;, "price": &lt;integer&gt;, "unit": &lt;"sat"
+          or "USD"&gt;}'
         </code>
       </q-card-section>
     </q-card>
@@ -74,7 +89,10 @@
         </h5>
         <code
           >{"id": &lt;integer&gt;, "wallet": &lt;string&gt;, "wordlist":
-          &lt;string&gt;, "items": [{"id": &lt;integer&gt;, "name": &lt;string&gt;, "description": &lt;string&gt;, "image": &lt;string&gt;, "enabled": &lt;boolean&gt;, "price": &lt;integer&gt;, "unit": &lt;string&gt;, "lnurl": &lt;string&gt;}, ...]}&lt;/code
+          &lt;string&gt;, "items": [{"id": &lt;integer&gt;, "name":
+          &lt;string&gt;, "description": &lt;string&gt;, "image":
+          &lt;string&gt;, "enabled": &lt;boolean&gt;, "price": &lt;integer&gt;,
+          "unit": &lt;string&gt;, "lnurl": &lt;string&gt;}, ...]}&lt;</code
         >
         <h5 class="text-caption q-mt-sm q-mb-none">Curl example</h5>
         <code
diff --git a/lnbits/extensions/offlineshop/views_api.py b/lnbits/extensions/offlineshop/views_api.py
index 41aa2cf6f..211306e54 100644
--- a/lnbits/extensions/offlineshop/views_api.py
+++ b/lnbits/extensions/offlineshop/views_api.py
@@ -24,7 +24,14 @@ async def api_shop_from_wallet():
 
     try:
         return (
-            jsonify({**shop._asdict(), **{"items": [item.values() for item in items],},}),
+            jsonify(
+                {
+                    **shop._asdict(),
+                    **{
+                        "items": [item.values() for item in items],
+                    },
+                }
+            ),
             HTTPStatus.OK,
         )
     except LnurlInvalidUrl:
@@ -50,7 +57,12 @@ async def api_add_or_update_item(item_id=None):
     shop = await get_or_create_shop_by_wallet(g.wallet.id)
     if item_id == None:
         await add_item(
-            shop.id, g.data["name"], g.data["description"], g.data.get("image"), g.data["price"], g.data["unit"],
+            shop.id,
+            g.data["name"],
+            g.data["description"],
+            g.data.get("image"),
+            g.data["price"],
+            g.data["unit"],
         )
         return "", HTTPStatus.CREATED
     else:
@@ -77,7 +89,9 @@ async def api_delete_item(item_id):
 @offlineshop_ext.route("/api/v1/offlineshop/wordlist", methods=["PUT"])
 @api_check_wallet_key("invoice")
 @api_validate_post_request(
-    schema={"wordlist": {"type": "string", "empty": True, "nullable": True, "required": True},}
+    schema={
+        "wordlist": {"type": "string", "empty": True, "nullable": True, "required": True},
+    }
 )
 async def api_set_wordlist():
     wordlist = g.data["wordlist"].split("\n") if g.data["wordlist"] else None