diff --git a/app/data/gasBillRepo.test.ts b/app/data/gasBillRepo.test.ts
index 327d9e27..c75576de 100644
--- a/app/data/gasBillRepo.test.ts
+++ b/app/data/gasBillRepo.test.ts
@@ -18,14 +18,14 @@ describe("gasBillRepo", () => {
     const mockGasBill = 150; // Example gas bill amount
 
     (prisma.gasBills.findFirstOrThrow as jest.Mock).mockResolvedValueOnce({
-      kwh_cost_pence: mockGasBill,
+      kwhCostPence: mockGasBill,
     });
 
     const result = await gasBillRepo.getGasBillByITL3(itl);
     expect(result).toBe(mockGasBill);
     expect(prisma.gasBills.findFirstOrThrow).toHaveBeenCalledWith({
       where: { itl1: { startsWith: itl.substring(0, 3) } },
-      select: { kwh_cost_pence: true },
+      select: { kwhCostPence: true },
     });
   });
 
diff --git a/app/data/gasBillRepo.ts b/app/data/gasBillRepo.ts
index 21125ce3..2805d1c3 100644
--- a/app/data/gasBillRepo.ts
+++ b/app/data/gasBillRepo.ts
@@ -2,14 +2,14 @@ import prisma from "./db";
 
 const getGasBillByITL3 = async (itl: string): Promise<number> => {
     try {
-        const { kwh_cost_pence } = await prisma.gasBills.findFirstOrThrow({
+        const { kwhCostPence } = await prisma.gasBills.findFirstOrThrow({
             where: {
                 itl1: { startsWith: itl.substring(0, 3) },
             },
-            select: { kwh_cost_pence: true },
+            select: { kwhCostPence: true },
         });
 
-        return kwh_cost_pence;
+        return kwhCostPence;
     } catch (error) {
         throw Error(`Data error: Unable to find gas_bills_2020 for itl3 ${itl}`);
     }
diff --git a/prisma/schema.prisma b/prisma/schema.prisma
index 4bbe3324..3b8d4669 100644
--- a/prisma/schema.prisma
+++ b/prisma/schema.prisma
@@ -92,7 +92,7 @@ model GasBills {
   id     Int    @id
   region String @map("region") @db.VarChar
   itl1    String @db.VarChar
-  kwh_cost_pence   Float
+  kwhCostPence   Float @map("kwh_cost_pence")
 
   @@map("gas_bills")
 }