diff --git a/src/server/schemas/event.ts b/src/server/schemas/event.ts
index 9f1f9f30..46bf3e87 100644
--- a/src/server/schemas/event.ts
+++ b/src/server/schemas/event.ts
@@ -1,24 +1,10 @@
 import { BigNumber } from "ethers";
 
-export type ContractEventV5 = {
-  eventName: string;
-  args: Record<string, any>;
-  address: string;
-  topic: string[];
-  data: string;
-  blockNumber: bigint;
-  transactionHash: string;
-  transactionIndex: number;
-  blockHash: string;
-  logIndex: number;
-  removed: boolean;
-};
-
 export type ContractEventV4 = {
   eventName: string;
   data: Record<string, any>;
   transaction: {
-    blockNumber: bigint;
+    blockNumber: bigint | number;
     blockHash: string;
     transactionIndex: number;
     removed: boolean;
@@ -28,15 +14,31 @@ export type ContractEventV4 = {
     transactionHash: string;
     logIndex: number;
     event: string;
-    eventSignature: string | undefined;
+    eventSignature?: string;
   };
 };
 
+export type ContractEventV5 = {
+  eventName: string;
+  args: Record<string, any>;
+  address: string;
+  topic: string[];
+  data: string;
+  blockNumber: bigint;
+  transactionHash: string;
+  transactionIndex: number;
+  blockHash: string;
+  logIndex: number;
+  removed: boolean;
+};
+
 /**
  * Mapping of events v5 response to v4 for backward compatiblity.
  * Clients may be using this api and dont want to break things.
  */
-export function toContractEventV4Schema(eventV5: ContractEventV5) {
+export function toContractEventV4Schema(
+  eventV5: ContractEventV5,
+): ContractEventV4 {
   const eventName = eventV5.eventName;
 
   // backwards compatibility of BigInt(v5) to BigNumber(v4)