diff --git a/src/sup/cli.py b/src/sup/cli.py
index 282de48..1558212 100644
--- a/src/sup/cli.py
+++ b/src/sup/cli.py
@@ -14,7 +14,14 @@ from typing_extensions import Annotated
 
 import typer
 
-from sup.main import load_ordered_supps, ORDERED_SUPPS_FP, load_config, SUPP_CONSUMPTION_FP, load_inventory, Supp
+from sup.main import (
+    load_ordered_supps,
+    ORDERED_SUPPS_FP,
+    load_config,
+    SUPP_CONSUMPTION_FP,
+    load_inventory,
+    Supp,
+)
 
 app = typer.Typer()
 
@@ -23,13 +30,17 @@ class UnitMismatch(Exception):
     pass
 
 
-def get_qty_inventory(supp: Supp, inventory: dict) -> int: 
-    inventory_order_date = dt.datetime.strptime(inventory['orderDate'][:10], "%Y-%m-%d").date()
+def get_qty_inventory(supp: Supp, inventory: dict) -> int:
+    inventory_order_date = dt.datetime.strptime(
+        inventory["orderDate"][:10], "%Y-%m-%d"
+    ).date()
     num_days_since_bought = (dt.date.today() - inventory_order_date).days
-    if inventory['servingUnit'] != supp.units:
+    if inventory["servingUnit"] != supp.units:
         raise UnitMismatch(inventory, supp)
 
-    return (inventory['quantity'] * inventory['numBottles']) - (supp * num_days_since_bought)
+    return (inventory["quantity"] * inventory["numBottles"]) - (
+        supp * num_days_since_bought
+    )
 
 
 def get_num_winter_days_starting(num_days: int, starting: dt.date) -> int:
@@ -62,14 +73,18 @@ def get_num_winter_days_starting(num_days: int, starting: dt.date) -> int:
 def status():
     """check if there's enough inventory for the next fill-up; if not, what to order?"""
     config = load_config()
-    num_days_of_inventory_needed = config['FILL_EVERY_X_DAYS']
-    next_fill_date = config['LAST_FILL_DATE'] + dt.timedelta(num_days_of_inventory_needed)
+    num_days_of_inventory_needed = config["FILL_EVERY_X_DAYS"]
+    next_fill_date = config["LAST_FILL_DATE"] + dt.timedelta(
+        num_days_of_inventory_needed
+    )
     inventory = load_inventory()
     needs = []
-    for sup in config['supps']:
+    for sup in config["supps"]:
         sup_inst = Supp(**sup)
         if sup_inst.winter_only:
-            num_days_of_inventory_needed = get_num_winter_days_starting(num_days_of_inventory_needed, next_fill_date)
+            num_days_of_inventory_needed = get_num_winter_days_starting(
+                num_days_of_inventory_needed, next_fill_date
+            )
         qty_needed = sup_inst * num_days_of_inventory_needed
         try:
             inv = inventory[sup_inst.name]
@@ -77,7 +92,7 @@ def status():
             qty_of_inventory = 0
         else:
             qty_of_inventory = get_qty_inventory(sup_inst, inv)
-        net_need = qty_needed - qty_of_inventory 
+        net_need = qty_needed - qty_of_inventory
         if net_need > 0:
             needs.append((sup_inst.name, net_need, sup_inst.units))
     if needs:
@@ -92,11 +107,13 @@ def fill():
     config = load_config()
     today = dt.date.today()
     config["LAST_FILL_DATE"] = today.strftime("%Y-%m-%d")
-    # TODO: make sure this toml library doesn't add quotes to this entry, it 
+    # TODO: make sure this toml library doesn't add quotes to this entry, it
     #       makes it so when reading it doesn't get parsed to a date
-    fill_every_x_days = config['FILL_EVERY_X_DAYS']
+    fill_every_x_days = config["FILL_EVERY_X_DAYS"]
     save_config(config)
-    print(f"Okay, next fill-up set to {today + dt.timedelta(days=fill_every_x_days)} (configured in `sup.toml`::FILL_EVERY_X_DAYS)")
+    print(
+        f"Okay, next fill-up set to {today + dt.timedelta(days=fill_every_x_days)} (configured in `sup.toml`::FILL_EVERY_X_DAYS)"
+    )
 
 
 @app.command()
diff --git a/src/sup/main.py b/src/sup/main.py
index b7a6509..3ec31b0 100644
--- a/src/sup/main.py
+++ b/src/sup/main.py
@@ -18,11 +18,10 @@ def load_config():
     return tomllib.loads(SUPP_CONSUMPTION_FP.read_text())
 
 
-
-
 def load_ordered_supps() -> list[dict]:
     return json.loads(ORDERED_SUPPS_FP.read_text())
 
+
 CONFIG = load_config()
 ALIASES = CONFIG["product_aliases"]
 
@@ -30,13 +29,18 @@ ordered_supps = load_ordered_supps()
 
 for i in CONFIG["supps"]:
     for ordered_supp in ordered_supps:
-        if i["name"].lower() in ordered_supp['name'].lower():
-            ALIASES[ordered_supp['name']] = i["name"]
+        if i["name"].lower() in ordered_supp["name"].lower():
+            ALIASES[ordered_supp["name"]] = i["name"]
 
 ALIASES_REV = {v: k for k, v in ALIASES.items()}
 
+
 def load_inventory():
-    return { ALIASES[s['name']]: s for s in load_ordered_supps() if s['name'] not in CONFIG['discontinued'] }
+    return {
+        ALIASES[s["name"]]: s
+        for s in load_ordered_supps()
+        if s["name"] not in CONFIG["discontinued"]
+    }
 
 
 class Missing(Exception):
@@ -77,7 +81,11 @@ class Supp:
 
     @property
     def quantity_per_day(self) -> float:
-        return sum([self.morning, self.lunch, self.dinner, self.bedtime]) * 7 / self.days_per_week
+        return (
+            sum([self.morning, self.lunch, self.dinner, self.bedtime])
+            * 7
+            / self.days_per_week
+        )
 
 
 def main():