diff --git a/packages/cli/src/cmds/node/handler.ts b/packages/cli/src/cmds/node/handler.ts
index f9b25468..c6c6430b 100644
--- a/packages/cli/src/cmds/node/handler.ts
+++ b/packages/cli/src/cmds/node/handler.ts
@@ -27,7 +27,7 @@ export async function nodeHandler(args: IGlobalArgs): Promise<void> {
   let config: Config;
   try {
     const configOptions = readFile(params.configFile) as ConfigOptions;
-    config = new Config({
+    config = await Config.init({
       networks: configOptions.networks,
       testingMode: params.testingMode,
       unsafeMode: params.unsafeMode,
@@ -35,7 +35,7 @@ export async function nodeHandler(args: IGlobalArgs): Promise<void> {
     });
   } catch (err) {
     logger.info("Config file not found. Proceeding with env vars...");
-    config = new Config({
+    config = await Config.init({
       networks: {},
       testingMode: false,
       unsafeMode: false,
diff --git a/packages/cli/src/cmds/standalone/handler.ts b/packages/cli/src/cmds/standalone/handler.ts
index 990de77c..b9840a98 100644
--- a/packages/cli/src/cmds/standalone/handler.ts
+++ b/packages/cli/src/cmds/standalone/handler.ts
@@ -34,7 +34,7 @@ export async function bundlerHandler(
   let config: Config;
   try {
     const configOptions = readFile(configFile) as ConfigOptions;
-    config = new Config({
+    config = await Config.init({
       networks: configOptions.networks,
       testingMode,
       unsafeMode,
@@ -42,7 +42,7 @@ export async function bundlerHandler(
     });
   } catch (err) {
     logger.debug("Config file not found. Proceeding with env vars...");
-    config = new Config({
+    config = await Config.init({
       networks: {},
       testingMode,
       unsafeMode,
diff --git a/packages/executor/src/config.ts b/packages/executor/src/config.ts
index 594f9a1b..8884a534 100644
--- a/packages/executor/src/config.ts
+++ b/packages/executor/src/config.ts
@@ -25,6 +25,12 @@ export class Config {
     this.networks = this.parseNetworkConfigs();
   }
 
+  static async init(configOptions: ConfigOptions): Promise<Config> {
+    const config = new Config(configOptions);
+    await config.fetchChainIds();
+    return config;
+  }
+
   getNetworkProvider(network: string): providers.JsonRpcProvider | null {
     const conf = this.networks[network];
     const endpoint = conf?.rpcEndpoint;