diff --git a/.flake8 b/.flake8
index 6c11afad..9fc73459 100644
--- a/.flake8
+++ b/.flake8
@@ -2,6 +2,8 @@
 max-line-length = 150
 exclude = lnbits/wallets/lnd_grpc_files/, lnbits/extensions/
 ignore =
+    # E203 whitespace before ':' black does not like it
+    E203
     # E402: module level import not at top of file
     E402,
     # W503: line break before binary operator
diff --git a/lnbits/bolt11.py b/lnbits/bolt11.py
index 9c7229cb..c2e750f1 100644
--- a/lnbits/bolt11.py
+++ b/lnbits/bolt11.py
@@ -50,7 +50,7 @@ def decode(pr: str) -> Invoice:
         raise ValueError("Too short to contain signature")
 
     # extract the signature
-    signature = bitarray[-65 * 8:].tobytes()
+    signature = bitarray[-65 * 8 :].tobytes()
 
     # the tagged fields as a bitstream
     data = bitstring.ConstBitStream(bitarray[: -65 * 8])
@@ -61,7 +61,7 @@ def decode(pr: str) -> Invoice:
     # decode the amount from the hrp
     m = re.search(r"[^\d]+", hrp[2:])
     if m:
-        amountstr = hrp[2 + m.end():]
+        amountstr = hrp[2 + m.end() :]
         if amountstr != "":
             invoice.amount_msat = _unshorten_amount(amountstr)
 
diff --git a/lnbits/core/migrations.py b/lnbits/core/migrations.py
index b66fa696..435e30b0 100644
--- a/lnbits/core/migrations.py
+++ b/lnbits/core/migrations.py
@@ -109,7 +109,7 @@ async def m002_add_fields_to_apipayments(db):
             for ext in ["withdraw", "events", "lnticket", "paywall", "tpos"]:
                 prefix = f"#{ext} "
                 if row["memo"].startswith(prefix):
-                    new = row["memo"][len(prefix):]
+                    new = row["memo"][len(prefix) :]
                     await db.execute(
                         """
                         UPDATE apipayments SET extra = ?, memo = ?
diff --git a/lnbits/middleware.py b/lnbits/middleware.py
index 815dbc2f..93a5671c 100644
--- a/lnbits/middleware.py
+++ b/lnbits/middleware.py
@@ -125,7 +125,7 @@ class ExtensionsRedirectMiddleware:
     def _new_path(self, redirect: dict, req_path: str) -> str:
         from_path = redirect["from_path"].split("/")
         redirect_to = redirect["redirect_to_path"].split("/")
-        req_tail_path = req_path.split("/")[len(from_path):]
+        req_tail_path = req_path.split("/")[len(from_path) :]
 
         elements = [
             e for e in ([redirect["ext_id"]] + redirect_to + req_tail_path) if e != ""
diff --git a/lnbits/wallets/lnbits.py b/lnbits/wallets/lnbits.py
index e222b1a1..902711d6 100644
--- a/lnbits/wallets/lnbits.py
+++ b/lnbits/wallets/lnbits.py
@@ -164,7 +164,7 @@ class LNbitsWallet(Wallet):
                                 sse_trigger = True
                                 continue
                             elif sse_trigger and line.startswith("data:"):
-                                data = json.loads(line[len("data:"):])
+                                data = json.loads(line[len("data:") :])
                                 sse_trigger = False
                                 yield data["payment_hash"]
                             else:
diff --git a/lnbits/wallets/lntips.py b/lnbits/wallets/lntips.py
index e6a3275b..be8159b9 100644
--- a/lnbits/wallets/lntips.py
+++ b/lnbits/wallets/lntips.py
@@ -155,7 +155,7 @@ class LnTipsWallet(Wallet):
                                 prefix = "data: "
                                 if not line.startswith(prefix):
                                     continue
-                                data = line[len(prefix):]  # sse parsing
+                                data = line[len(prefix) :]  # sse parsing
                                 inv = json.loads(data)
                                 if not inv.get("payment_hash"):
                                     continue
diff --git a/lnbits/wallets/void.py b/lnbits/wallets/void.py
index c109ddd0..60f981ea 100644
--- a/lnbits/wallets/void.py
+++ b/lnbits/wallets/void.py
@@ -23,10 +23,12 @@ class VoidWallet(Wallet):
         raise Unsupported("")
 
     async def status(self) -> StatusResponse:
-        logger.warning((
-            "This backend does nothing, it is here just as a placeholder, you must configure an "
-            "actual backend before being able to do anything useful with LNbits."
-        ))
+        logger.warning(
+            (
+                "This backend does nothing, it is here just as a placeholder, you must configure an "
+                "actual backend before being able to do anything useful with LNbits."
+            )
+        )
         return StatusResponse(None, 0)
 
     async def pay_invoice(self, bolt11: str, fee_limit_msat: int) -> PaymentResponse: