diff --git a/examples/build-tx-example.ts b/examples/build-tx-example.ts
index 8568fa4..5c34a31 100644
--- a/examples/build-tx-example.ts
+++ b/examples/build-tx-example.ts
@@ -776,7 +776,7 @@ export async function _multiRoutingTxExample(
   });
 }
 
-export async function _cancelV2TxExample(
+export function _cancelV2TxExample(
   lucid: Lucid,
   adapter: Adapter
 ): Promise<TxComplete> {
@@ -1032,7 +1032,7 @@ export async function _zapOutStableExample(
   });
 }
 
-export async function _bulkOrderStableExample(
+export function _bulkOrderStableExample(
   lucid: Lucid,
   address: string,
   availableUtxos: Utxo[]
diff --git a/src/dao.ts b/src/dao.ts
index 45dc91e..2f2c918 100644
--- a/src/dao.ts
+++ b/src/dao.ts
@@ -41,7 +41,7 @@ export class Dao {
    * This method builds a transaction with metadata that requests fee changes for a pool.
    * The transaction must be signed by the pool manager address.
    */
-  async updatePoolFeeTx(
+  updatePoolFeeTx(
     options: Omit<PoolFeeRequest, "version">
   ): Promise<TxComplete> {
     const { managerAddress, poolLPAsset, newFeeA, newFeeB } = options;
diff --git a/src/dex-v2.ts b/src/dex-v2.ts
index 27b34c3..c83865b 100644
--- a/src/dex-v2.ts
+++ b/src/dex-v2.ts
@@ -743,7 +743,7 @@ export class DexV2 {
     }
   }
 
-  async createBulkOrdersTx({
+  createBulkOrdersTx({
     sender,
     orderOptions,
     expiredOptions,
diff --git a/src/syncer/main.ts b/src/syncer/main.ts
index f2bfc89..826d33c 100644
--- a/src/syncer/main.ts
+++ b/src/syncer/main.ts
@@ -33,7 +33,7 @@ async function start(): Promise<void> {
   }
 }
 
-async function main(): Promise<void> {
+function main(): Promise<void> {
   return backOff(start, {
     retry(err, attempt): boolean {
       console.error(`Fail to run syncer, retry ${attempt}...`, err);
diff --git a/src/syncer/repository/postgres-repository.ts b/src/syncer/repository/postgres-repository.ts
index d83b9ea..45dacd0 100644
--- a/src/syncer/repository/postgres-repository.ts
+++ b/src/syncer/repository/postgres-repository.ts
@@ -342,7 +342,7 @@ export class PostgresRepositoryWriter extends PostgresRepositoryWriterInTransact
     this.prismaClientTx = prismaClient;
   }
 
-  async transaction(
+  transaction(
     fn: (repo: PostgresRepositoryWriterInTransaction) => Promise<void>,
     options: { timeout?: number; maxWait?: number },
   ): Promise<void> {
@@ -352,4 +352,3 @@ export class PostgresRepositoryWriter extends PostgresRepositoryWriterInTransact
     );
   }
 }
-
diff --git a/src/utils/job.ts b/src/utils/job.ts
index 2fb8e9d..b85376d 100644
--- a/src/utils/job.ts
+++ b/src/utils/job.ts
@@ -34,7 +34,7 @@ export async function runRecurringJob({
   }
 }
 
-async function sleep(durationInMs: number): Promise<unknown> {
+function sleep(durationInMs: number): Promise<unknown> {
   return new Promise((resolve) => {
     setTimeout(() => {
       resolve({ error: false, message: `Slept for ${durationInMs} ms` });
diff --git a/src/utils/lucid.ts b/src/utils/lucid.ts
index 017c6f8..320c58e 100644
--- a/src/utils/lucid.ts
+++ b/src/utils/lucid.ts
@@ -15,16 +15,16 @@ import { NetworkId } from "../types/network";
  * @param address Your own address
  * @returns
  */
-export async function getBackendBlockfrostLucidInstance(
+export function getBackendBlockfrostLucidInstance(
   networkId: NetworkId,
   projectId: string,
   blockfrostUrl: string,
   address: string,
-): Promise<Lucid> {
+): Lucid {
   const provider = new Blockfrost(blockfrostUrl, projectId);
   const lucid = new Lucid({
     provider: provider,
-    network: networkId === NetworkId.MAINNET ? 'Mainnet' : 'Preprod',
+    network: networkId === NetworkId.MAINNET ? "Mainnet" : "Preprod",
   });
   lucid.selectReadOnlyWallet({
     address: address,
@@ -39,11 +39,11 @@ export async function getBackendBlockfrostLucidInstance(
  * @param address Your own address
  * @returns
  */
-export async function getBackendMaestroLucidInstance(
+export function getBackendMaestroLucidInstance(
   network: MaestroSupportedNetworks,
   apiKey: string,
   address: string,
-): Promise<Lucid> {
+): Lucid {
   const provider = new Maestro({
     network: network,
     apiKey: apiKey,