diff --git a/Projects/Domains/UserDomain/Sources/API/UserAPI.swift b/Projects/Domains/UserDomain/Sources/API/UserAPI.swift
index 3b88ee49d..90f56a558 100644
--- a/Projects/Domains/UserDomain/Sources/API/UserAPI.swift
+++ b/Projects/Domains/UserDomain/Sources/API/UserAPI.swift
@@ -141,7 +141,9 @@ extension UserAPI: WMAPI {
             return [
                 400: .badRequest,
                 401: .tokenExpired,
+                403: .forbidden,
                 404: .notFound,
+                409: .conflict,
                 429: .tooManyRequest,
                 500: .internalServerError
             ]
diff --git a/Projects/Features/BaseFeature/Sources/ViewControllers/MultiPurposePopupViewController.swift b/Projects/Features/BaseFeature/Sources/ViewControllers/MultiPurposePopupViewController.swift
index 7e2740ebd..704619da2 100644
--- a/Projects/Features/BaseFeature/Sources/ViewControllers/MultiPurposePopupViewController.swift
+++ b/Projects/Features/BaseFeature/Sources/ViewControllers/MultiPurposePopupViewController.swift
@@ -117,8 +117,6 @@ private extension MultiPurposePopupViewController {
 
 private extension MultiPurposePopupViewController {
     func configureUI() {
-        limitLabel.text = "/\(viewModel.type.textLimitCount)"
-
         titleLabel.text = viewModel.type.title
         titleLabel.font = DesignSystemFontFamily.Pretendard.medium.font(size: 18)
         titleLabel.textColor = DesignSystemAsset.BlueGrayColor.gray900.color
@@ -155,6 +153,7 @@ private extension MultiPurposePopupViewController {
         confirmLabel.font = DesignSystemFontFamily.Pretendard.light.font(size: 12)
         confirmLabel.isHidden = true
 
+        limitLabel.text = "/\(viewModel.type.textLimitCount)자"
         limitLabel.font = DesignSystemFontFamily.Pretendard.light.font(size: 12)
         limitLabel.textColor = DesignSystemAsset.BlueGrayColor.gray500.color
 
diff --git a/Projects/Features/MyInfoFeature/Sources/Reactors/MyInfoReactor.swift b/Projects/Features/MyInfoFeature/Sources/Reactors/MyInfoReactor.swift
index f7ffbbc91..06f465b98 100644
--- a/Projects/Features/MyInfoFeature/Sources/Reactors/MyInfoReactor.swift
+++ b/Projects/Features/MyInfoFeature/Sources/Reactors/MyInfoReactor.swift
@@ -295,10 +295,14 @@ private extension MyInfoReactor {
             )
             .catch { error in
                 let error = error.asWMError
-                return .concat(
-                    .just(.showToast(error.errorDescription ?? LocalizationStrings.unknownErrorWarning)),
-                    .just(.dismissEditSheet)
-                )
+                if error == .conflict {
+                    return .just(.showToast("키워드 또는 중복된 닉네임은 사용할 수 없습니다."))
+                } else {
+                    return .concat(
+                        .just(.showToast(error.errorDescription ?? LocalizationStrings.unknownErrorWarning)),
+                        .just(.dismissEditSheet)
+                    )
+                }
             }
     }