diff --git a/lnbits/bolt11.py b/lnbits/bolt11.py
index a7224d887..43288c6fb 100644
--- a/lnbits/bolt11.py
+++ b/lnbits/bolt11.py
@@ -228,7 +228,7 @@ def lnencode(addr, privkey):
     # both.
     if "d" in tags_set and "h" in tags_set:
         raise ValueError("Cannot include both 'd' and 'h'")
-    if not "d" in tags_set and not "h" in tags_set:
+    if "d" not in tags_set and "h" not in tags_set:
         raise ValueError("Must include either 'd' or 'h'")
 
     # We actually sign the hrp, then data (padded to 8 bits with zeroes).
diff --git a/lnbits/core/services.py b/lnbits/core/services.py
index 950e3f321..1e33cd470 100644
--- a/lnbits/core/services.py
+++ b/lnbits/core/services.py
@@ -449,7 +449,7 @@ async def check_admin_settings():
 
 def update_cached_settings(sets_dict: dict):
     for key, value in sets_dict.items():
-        if not key in readonly_variables + transient_variables:
+        if key not in readonly_variables:
             try:
                 setattr(settings, key, value)
             except:
diff --git a/lnbits/core/views/generic.py b/lnbits/core/views/generic.py
index b4ecaf4af..0dd8af5fc 100644
--- a/lnbits/core/views/generic.py
+++ b/lnbits/core/views/generic.py
@@ -137,7 +137,7 @@ async def extensions_install(
                     "dependencies": ext.dependencies,
                     "isInstalled": ext.id in installed_exts_ids,
                     "isAvailable": ext.id in all_extensions,
-                    "isActive": not ext.id in inactive_extensions,
+                    "isActive": ext.id not in inactive_extensions,
                     "latestRelease": dict(ext.latest_release)
                     if ext.latest_release
                     else None,
diff --git a/lnbits/db.py b/lnbits/db.py
index 77f3cf33a..985a658bf 100644
--- a/lnbits/db.py
+++ b/lnbits/db.py
@@ -135,7 +135,7 @@ class Database(Compat):
                 if value is None:
                     return None
                 f = "%Y-%m-%d %H:%M:%S.%f"
-                if not "." in value:
+                if "." not in value:
                     f = "%Y-%m-%d %H:%M:%S"
                 return time.mktime(datetime.datetime.strptime(value, f).timetuple())
 
diff --git a/lnbits/decorators.py b/lnbits/decorators.py
index 42d2b7a30..17134f863 100644
--- a/lnbits/decorators.py
+++ b/lnbits/decorators.py
@@ -245,7 +245,7 @@ async def check_user_exists(usr: UUID4) -> User:
 
 async def check_admin(usr: UUID4) -> User:
     user = await check_user_exists(usr)
-    if user.id != settings.super_user and not user.id in settings.lnbits_admin_users:
+    if user.id != settings.super_user and user.id not in settings.lnbits_admin_users:
         raise HTTPException(
             status_code=HTTPStatus.UNAUTHORIZED,
             detail="User not authorized. No admin privileges.",
diff --git a/lnbits/extension_manager.py b/lnbits/extension_manager.py
index 8371aea9a..7eff9480b 100644
--- a/lnbits/extension_manager.py
+++ b/lnbits/extension_manager.py
@@ -467,7 +467,7 @@ class InstalledExtensionMiddleware:
         self.app = app
 
     async def __call__(self, scope: Scope, receive: Receive, send: Send) -> None:
-        if not "path" in scope:
+        if "path" not in scope:
             await self.app(scope, receive, send)
             return
 
diff --git a/lnbits/extensions/bleskomat/helpers.py b/lnbits/extensions/bleskomat/helpers.py
index 0b2f34710..f61a56403 100644
--- a/lnbits/extensions/bleskomat/helpers.py
+++ b/lnbits/extensions/bleskomat/helpers.py
@@ -128,7 +128,7 @@ def unshorten_lnurl_query(query: dict) -> Dict[str, str]:
         long_tag = rules["tags"][tag]
         new_query["tag"] = long_tag
         tag = long_tag
-    if not tag in rules["params"]:
+    if tag not in rules["params"]:
         raise LnurlValidationError(f'Unknown tag: "{tag}"')
     for key in query:
         if key in rules["params"][str(tag)]:
@@ -142,7 +142,7 @@ def unshorten_lnurl_query(query: dict) -> Dict[str, str]:
             # Unshorten general keys:
             short_key = key
             long_key = rules["query"][short_key]
-            if not long_key in new_query:
+            if long_key not in new_query:
                 if short_key in query:
                     new_query[long_key] = query[short_key]
                 else:
diff --git a/lnbits/extensions/bleskomat/lnurl_api.py b/lnbits/extensions/bleskomat/lnurl_api.py
index bdac5fecf..c892cc5ad 100644
--- a/lnbits/extensions/bleskomat/lnurl_api.py
+++ b/lnbits/extensions/bleskomat/lnurl_api.py
@@ -42,7 +42,7 @@ async def api_bleskomat_lnurl(req: Request):
 
             # The API key ID, nonce, and tag should be present in the query string.
             for field in ["id", "nonce", "tag"]:
-                if not field in query:
+                if field not in query:
                     raise LnurlHttpError(
                         f'Failed API key signature check: Missing "{field}"',
                         HTTPStatus.BAD_REQUEST,
@@ -105,7 +105,7 @@ async def api_bleskomat_lnurl(req: Request):
         # No signature provided.
         # Treat as "action" callback.
 
-        if not "k1" in query:
+        if "k1" not in query:
             raise LnurlHttpError("Missing secret", HTTPStatus.BAD_REQUEST)
 
         secret = query["k1"]
diff --git a/lnbits/extensions/bleskomat/models.py b/lnbits/extensions/bleskomat/models.py
index 6dc88dc07..5aec7969d 100644
--- a/lnbits/extensions/bleskomat/models.py
+++ b/lnbits/extensions/bleskomat/models.py
@@ -85,7 +85,7 @@ class BleskomatLnurl(BaseModel):
         # Perform tag-specific checks.
         if tag == "withdrawRequest":
             for field in ["pr"]:
-                if not field in query:
+                if field not in query:
                     raise LnurlValidationError(f'Missing required parameter: "{field}"')
             # Check the bolt11 invoice(s) provided.
             pr = query["pr"]