diff --git a/libs/event-emitter/src/configs/main-config.ts b/libs/event-emitter/src/configs/main-config.ts
index 7102eba..44b409a 100644
--- a/libs/event-emitter/src/configs/main-config.ts
+++ b/libs/event-emitter/src/configs/main-config.ts
@@ -3,7 +3,13 @@ import { join } from 'path';
 import { parse } from 'jsonc-parser';
 import { MainConfigModel } from '../models/main-config-model';
 
+let data: MainConfigModel | null = null;
+
 export default (): MainConfigModel => {
+  if (data) {
+    return data;
+  }
+
   const userDefinedConfigPath =
     process.env['REDMINE_ISSUE_EVENT_EMITTER_CONFIG_PATH'];
   const defaultConfigPath = 'configs';
@@ -13,6 +19,6 @@ export default (): MainConfigModel => {
     encoding: 'utf-8',
   });
 
-  const data: MainConfigModel = parse(rawData);
+  data = parse(rawData);
   return data;
 };