diff --git a/functions/api/avatars/index.js b/functions/api/avatars/index.js
index ef1e7cb..58e7401 100644
--- a/functions/api/avatars/index.js
+++ b/functions/api/avatars/index.js
@@ -19,8 +19,9 @@ export async function onRequestPut(context) {
       return createErrorResponse("Missing avatar", 400);
     }
 
-    if (avatar.size > 2 * 1024 * 1024) {
-      return createErrorResponse("Avatar must be less than 2MB", 400);
+    if (avatar.size > 1 * 1024 * 1024) {
+      // Entity too large
+      return createErrorResponse("Avatar must be less than 1MB", 413);
     }
 
     const buffer = await avatar.arrayBuffer();
diff --git a/src/components/Profile/ProfileForm.vue b/src/components/Profile/ProfileForm.vue
index 1bca836..4ddd1f3 100644
--- a/src/components/Profile/ProfileForm.vue
+++ b/src/components/Profile/ProfileForm.vue
@@ -25,17 +25,17 @@ const onSubmit = async () => {
   avatarError.value = '';
 
   if (!avatarFile.value) {
-    avatarError.value = 'Avatar is required.';
+    avatarError.value = '必須選擇新頭貼。';
     return;
   }
 
-  if (avatarFile.value.size > 2 * 1024 * 1024) {
-    avatarError.value = 'Avatar must be less than 2MB.';
+  if (avatarFile.value.size > 1 * 1024 * 1024) {
+    avatarError.value = '頭貼檔案需小於 1MB。';
     return;
   }
 
   if (avatarFile.value.type !== 'image/jpeg' && avatarFile.value.type !== 'image/png') {
-    avatarError.value = 'Avatar must be a JPG or PNG image.';
+    avatarError.value = '頭貼必須是 JPG 或 PNG 格式。';
     return;
   }
 
@@ -72,7 +72,7 @@ const avatarUrl = computed(() => {
           </div>
         </div>
         <div class="ts-control is-wide">
-          <div class="label">Avatar</div>
+          <div class="label">頭貼</div>
           <div class="content is-fluid">
             <div v-if="avatarUrl">
               <img :src="avatarUrl" alt="Avatar" style="max-width: 100px; max-height: 100px;" />
@@ -81,7 +81,7 @@ const avatarUrl = computed(() => {
               <input type="file" accept="image/jpeg, image/png" @change="onFileChange" />
             </div>
             <div class="ts-text is-small is-negative" v-if="avatarError">{{ avatarError }}</div>
-            <div class="ts-text is-small">Avatar 必須是 JPG 或 PNG 格式。檔案需小於 2MB。</div>
+            <div class="ts-text is-small">頭貼必須是 JPG 或 PNG 格式。檔案需小於 1MB。</div>
           </div>
         </div>
       </div>