diff --git a/.flake8 b/.flake8
new file mode 100644
index 0000000..e0ea542
--- /dev/null
+++ b/.flake8
@@ -0,0 +1,3 @@
+[flake8]
+max-line-length = 88
+extend-ignore = E203
\ No newline at end of file
diff --git a/pfbudget/cli/interactive.py b/pfbudget/cli/interactive.py
index f0c3c7e..cd392c1 100644
--- a/pfbudget/cli/interactive.py
+++ b/pfbudget/cli/interactive.py
@@ -65,7 +65,8 @@ class Interactive:
                             continue
 
                         if other.startswith("note:"):
-                            # TODO adding notes to a splitted transaction won't allow categorization
+                            # TODO adding notes to a splitted transaction won't allow
+                            # categorization
                             next.note = Note(other[len("note:") :].strip())
                         else:
                             ct = other.split(":")
diff --git a/pfbudget/core/categories.py b/pfbudget/core/categories.py
index 82c2653..4f5f4e1 100644
--- a/pfbudget/core/categories.py
+++ b/pfbudget/core/categories.py
@@ -54,7 +54,6 @@ groups = {
 
 
 def categorize_data(db: DatabaseClient):
-
     # 1st) Classifying null transactions, i.e. transfers between banks.
     # Will not overwrite previous categories
     nulls(db)
@@ -77,7 +76,8 @@ def categorize_data(db: DatabaseClient):
     # 4th) Manually update categories from the uncategorized transactions
     if transactions := db.get_uncategorized_transactions():
         print(
-            f"Still {len(transactions)} uncategorized transactions left. Type quit/exit to exit the program."
+            f"Still {len(transactions)} uncategorized transactions left. Type quit/exit"
+            "to exit the program."
         )
         for transaction in transactions:
             while True:
@@ -88,7 +88,8 @@ def categorize_data(db: DatabaseClient):
                     break
                 if category not in categories:
                     print(
-                        f"Category {category} doesn't exist. Please use one of {categories.keys()}"
+                        f"Category {category} doesn't exist. Please use one of"
+                        f"{categories.keys()}"
                     )
                 else:
                     transaction.category = category
diff --git a/pfbudget/core/manager.py b/pfbudget/core/manager.py
index 2bf5f0b..cf9f7c1 100644
--- a/pfbudget/core/manager.py
+++ b/pfbudget/core/manager.py
@@ -270,7 +270,8 @@ class Manager:
                                 row["date"], row["description"], row["amount"]
                             )
 
-                        # TODO case "split" how to match to original transaction?? also save ids?
+                        # TODO case "split" how to match to original transaction?? also
+                        # save ids?
                         case _:
                             continue
 
diff --git a/pfbudget/db/schema.py b/pfbudget/db/schema.py
index e212994..24c726a 100644
--- a/pfbudget/db/schema.py
+++ b/pfbudget/db/schema.py
@@ -141,7 +141,8 @@ ORDER BY date ASC
 """
 
 ADD_BANK = """
-INSERT INTO banks (name, bic, nordigen_id, nordigen_name, requisition_id, invert) values (?,?,?,?,?,?)
+INSERT INTO banks (name, bic, nordigen_id, nordigen_name, requisition_id, invert)
+values (?,?,?,?,?,?)
 """
 
 DELETE_BANK = """