diff --git a/src/constants/chains.ts b/src/constants/chains.ts
index d875c3f..969f15d 100644
--- a/src/constants/chains.ts
+++ b/src/constants/chains.ts
@@ -3,7 +3,7 @@ import { SupportedChainId } from '../types.js';
 export const developmentChains = [
   SupportedChainId.BSC_TESTNET,
   SupportedChainId.SEPOLIA,
-  SupportedChainId.EVENT_HORIZON,
+  SupportedChainId.EVENT_HORIZON_TESTNET,
 ];
 export const productionChains = [
   SupportedChainId.MAINNET,
diff --git a/src/types.ts b/src/types.ts
index 54fdbf4..f9639e6 100644
--- a/src/types.ts
+++ b/src/types.ts
@@ -95,7 +95,7 @@ export enum SupportedChainId {
 
   BSC_TESTNET = '97',
   SEPOLIA = '11155111',
-  EVENT_HORIZON = '123420000034',
+  EVENT_HORIZON_TESTNET = '123420000034',
 
   // For testing and debug purpose
   // BROKEN = '0',