diff --git a/client/README.md b/client/README.md
index 41d8633..aaf0ab0 100644
--- a/client/README.md
+++ b/client/README.md
@@ -51,7 +51,7 @@ export const {
 
 ```
 
-    pm2 start ecosystem.config.js
+    pm2 start ecosystem.config.cjs
 
 ### Run development
 
diff --git a/master/README.md b/master/README.md
index bfea9e9..0a16dee 100644
--- a/master/README.md
+++ b/master/README.md
@@ -32,7 +32,7 @@ export const {
 } = process.env;
 ```
 
-    pm2 start ecosystem.config.js
+    pm2 start ecosystem.config.cjs
 
 ### Run development