diff --git a/core/lib/products.py b/core/lib/products.py
index ed38932..f087f8c 100644
--- a/core/lib/products.py
+++ b/core/lib/products.py
@@ -1,5 +1,6 @@
 from core.models import Plan
 
+
 def assemble_plan_map(product_id_filter=None):
     """
     Get all the plans from the database and create an object Stripe wants.
@@ -9,8 +10,10 @@ def assemble_plan_map(product_id_filter=None):
         if product_id_filter:
             if plan.product_id != product_id_filter:
                 continue
-        line_items.append({
-            "price": plan.product_id,
-            "quantity": 1,
-        })
-    return line_items
\ No newline at end of file
+        line_items.append(
+            {
+                "price": plan.product_id,
+                "quantity": 1,
+            }
+        )
+    return line_items