diff --git a/src/modules/patterns.js b/src/modules/patterns.js
index c39706ad..7111ec1a 100644
--- a/src/modules/patterns.js
+++ b/src/modules/patterns.js
@@ -10,7 +10,7 @@ module.exports = {
     nickname: RegExp("^[A-Za-z가-힣ㄱ-ㅎㅏ-ㅣ0-9-_ ]{3,25}$"),
     allowedEmployeeTypes: RegExp("^([PEUR]|[SA]|[PEUR][SA])$"),
     profileImgType: RegExp("^(image/png|image/jpg|image/jpeg)$"),
-    account: RegExp("^[A-Za-z가-힣]{2,7} ([0-9]{10,14}|)$"),
+    account: RegExp("^[A-Za-z가-힣]{2,7} [0-9]{10,14}$|^$"),
   },
   chat: {
     chatImgType: RegExp("^(image/png|image/jpg|image/jpeg)$"),