diff --git a/src/components/01_branch-management/FormBranchInformation.vue b/src/components/01_branch-management/FormBranchInformation.vue
index 508d8c83..e3d21103 100644
--- a/src/components/01_branch-management/FormBranchInformation.vue
+++ b/src/components/01_branch-management/FormBranchInformation.vue
@@ -157,7 +157,8 @@ function formatCode(input: string | undefined, type: 'code' | 'number') {
           "
           :rules="[
             (val) => !!val || $t('form.error.required'),
-            (val) => /^[A-Za-z]+$/.test(val) || $t('form.error.letterOnly'),
+            (val) =>
+              /^[A-Za-z0-9\s]+$/.test(val) || $t('form.error.letterOnly'),
           ]"
           for="input-name-en"
         />