diff --git a/src/lib/swapper/swappers/CowSwapper/endpoints.ts b/src/lib/swapper/swappers/CowSwapper/endpoints.ts
index 49b43eeb35d..d2b45663e69 100644
--- a/src/lib/swapper/swappers/CowSwapper/endpoints.ts
+++ b/src/lib/swapper/swappers/CowSwapper/endpoints.ts
@@ -102,7 +102,7 @@ export const cowApi: Swapper2Api = {
       // from,
       sellTokenBalance: ERC20_TOKEN_BALANCE,
       buyTokenBalance: ERC20_TOKEN_BALANCE,
-      quoteId: id.toString(),
+      quoteId: id,
     }
 
     const adapter = assertGetEvmChainAdapter(sellAsset.chainId)
diff --git a/src/lib/swapper/swappers/CowSwapper/utils/helpers/helpers.ts b/src/lib/swapper/swappers/CowSwapper/utils/helpers/helpers.ts
index 5b7d37648ed..854282ab1e3 100644
--- a/src/lib/swapper/swappers/CowSwapper/utils/helpers/helpers.ts
+++ b/src/lib/swapper/swappers/CowSwapper/utils/helpers/helpers.ts
@@ -48,7 +48,7 @@ export type CowSwapOrder = {
   receiver: string
   sellTokenBalance: string
   buyTokenBalance: string
-  quoteId: string
+  quoteId: number
 }
 
 export type CowSwapQuoteApiInputBase = {