diff --git a/src/environment.ts b/src/environment.ts
index 45f5810..f152745 100644
--- a/src/environment.ts
+++ b/src/environment.ts
@@ -8,6 +8,7 @@ export const Env = z.object({
   TON_API_KEY: z.string().optional(),
   SERVER_PORT: z.string().optional(),
   SERVER_LINK: z.string().optional(),
+  NETWORK: z.union([z.literal("testnet"), z.literal("mainnet"), z.undefined()]),
 });
 export type Env = z.infer<typeof Env>;
 
diff --git a/src/index.ts b/src/index.ts
index b3c076a..398b7d2 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -29,9 +29,10 @@ async function main() {
 
   let config: IBridgeConfig = prodBridgeConfig;
 
-  if (process.argv.includes("--testnet")) {
+  const network = process.env.NETWORK;
+  if (network === "testnet") {
+    logger.info("Starting up testnet");
     config = testnetBridgeConfig;
-    logger.info("Setting up for testnet environment");
   }
 
   const deps = await configDeps(config, secrets, logger);