diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
deleted file mode 100644
index 0cab099..0000000
--- a/.pre-commit-config.yaml
+++ /dev/null
@@ -1,12 +0,0 @@
-repos:
-  - repo: https://github.com/astral-sh/ruff-pre-commit
-    rev: 'v0.11.7'
-    hooks:
-      - id: ruff
-        args: [--fix, --exit-non-zero-on-fix]
-      - id: ruff-format
-  - repo: https://github.com/adamchainz/django-upgrade
-    rev: "1.24.0"
-    hooks:
-      - id: django-upgrade
-        args: [--target-version, "5.2"]
diff --git a/.yamllint.yml b/.yamllint.yml
new file mode 100644
index 0000000..7eb4fef
--- /dev/null
+++ b/.yamllint.yml
@@ -0,0 +1,8 @@
+extends: default
+
+rules:
+  document-start: disable
+  line-length:
+    max: 120
+  truthy:
+    allowed-values: ["true", "false", "on", "off"]
diff --git a/bbs/api/queries/inventory.py b/bbs/api/queries/inventory.py
index 0059297..ca1e497 100644
--- a/bbs/api/queries/inventory.py
+++ b/bbs/api/queries/inventory.py
@@ -75,32 +75,24 @@ class InventoryQueries:
         inventory_purchases = sum((product["purchase_value"] for product in product_data), Decimal(0))
         product_sales = sum((product["sales_value"] for product in product_data), Decimal(0))
 
-        deposits = (
-            models.Transaction.objects.filter(created__range=(start_time, end_time)).aggregate(total=Sum("amount"))[
-                "total"
-            ]
-            or Decimal(0)
-        )
-        order_purchases = (
-            models.Order.objects.filter(created__range=(start_time, end_time)).aggregate(total=Sum("order_sum"))[
-                "total"
-            ]
-            or Decimal(0)
-        )
-        deposits_start = (
-            models.Transaction.objects.filter(created__lt=start_time).aggregate(total=Sum("amount"))["total"]
-            or Decimal(0)
-        )
-        orders_start = (
-            models.Order.objects.filter(created__lt=start_time).aggregate(total=Sum("order_sum"))["total"] or Decimal(0)
-        )
-        deposits_end = (
-            models.Transaction.objects.filter(created__lte=end_time).aggregate(total=Sum("amount"))["total"]
-            or Decimal(0)
-        )
-        orders_end = (
-            models.Order.objects.filter(created__lte=end_time).aggregate(total=Sum("order_sum"))["total"] or Decimal(0)
-        )
+        deposits = models.Transaction.objects.filter(created__range=(start_time, end_time)).aggregate(
+            total=Sum("amount")
+        )["total"] or Decimal(0)
+        order_purchases = models.Order.objects.filter(created__range=(start_time, end_time)).aggregate(
+            total=Sum("order_sum")
+        )["total"] or Decimal(0)
+        deposits_start = models.Transaction.objects.filter(created__lt=start_time).aggregate(total=Sum("amount"))[
+            "total"
+        ] or Decimal(0)
+        orders_start = models.Order.objects.filter(created__lt=start_time).aggregate(total=Sum("order_sum"))[
+            "total"
+        ] or Decimal(0)
+        deposits_end = models.Transaction.objects.filter(created__lte=end_time).aggregate(total=Sum("amount"))[
+            "total"
+        ] or Decimal(0)
+        orders_end = models.Order.objects.filter(created__lte=end_time).aggregate(total=Sum("order_sum"))[
+            "total"
+        ] or Decimal(0)
 
         return InventoryReport(
             products=[InventoryReportProduct(**product) for product in product_data],
diff --git a/prek.toml b/prek.toml
new file mode 100644
index 0000000..7e859fc
--- /dev/null
+++ b/prek.toml
@@ -0,0 +1,23 @@
+#:schema https://www.schemastore.org/prek.json
+
+[[repos]]
+repo = "https://github.com/astral-sh/ruff-pre-commit"
+rev = "v0.11.7"
+hooks = [
+    { id = "ruff", args = ["--fix", "--exit-non-zero-on-fix"] },
+    { id = "ruff-format" },
+]
+
+[[repos]]
+repo = "https://github.com/adamchainz/django-upgrade"
+rev = "1.24.0"
+hooks = [
+    { id = "django-upgrade", args = ["--target-version", "5.2"] },
+]
+
+[[repos]]
+repo = "https://github.com/adrienverge/yamllint"
+rev = "v1.38.0"
+hooks = [
+    { id = "yamllint" },
+]