diff --git a/env.example b/env.example
index f04db20..81e5f25 100644
--- a/env.example
+++ b/env.example
@@ -5,6 +5,8 @@
 # For development, set to http://localhost:3000 or any other port
 # -----------------------------------------------------------------------------
 NEXT_PUBLIC_BASE_URL="http://localhost:3000"
+# If your development port is not 3000, please set PORT to your port, e.g. 3005
+PORT=3000
 
 # -----------------------------------------------------------------------------
 # Database