diff --git a/myems-api/example.env b/myems-api/example.env
index 13064eca..76aa15d5 100644
--- a/myems-api/example.env
+++ b/myems-api/example.env
@@ -80,4 +80,7 @@ WORKING_DAY_START_TIME_LOCAL=00:00:00
 UPLOAD_PATH=/var/www/html/admin/upload/
 
 # main currency unit
-CURRENCY_UNIT=CNY
\ No newline at end of file
+CURRENCY_UNIT=CNY
+
+# maximum failed login count, otherwise the user should be locked
+MAXIMUM_FAILED_LOGIN_COUNT=3
\ No newline at end of file