diff --git a/src/public/upload.css b/src/public/upload.css
index b3dc1ed..91a788a 100644
--- a/src/public/upload.css
+++ b/src/public/upload.css
@@ -152,7 +152,7 @@ h1 {
   margin: -6px auto 16px;
   color: #5f6f6b;
   font-family: "Apple SD Gothic Neo", "Malgun Gothic", system-ui, sans-serif;
-  font-size: 12px;
+  font-size: 14px;
   line-height: 1.55;
   word-break: keep-all;
 }
@@ -494,4 +494,8 @@ h1 {
   .upload-panel__today {
     font-size: clamp(23px, 6.5vw, 29px);
   }
+
+  .upload-panel__notice {
+    font-size: 15px;
+  }
 }
diff --git a/src/public/upload.html b/src/public/upload.html
index 56574b1..acd1d12 100644
--- a/src/public/upload.html
+++ b/src/public/upload.html
@@ -20,7 +20,7 @@
         <div class="guest-fields" aria-label="업로드하시는 분 정보">
           <label>
             <span>연락처</span>
-            <input type="tel" name="guestPhone" autocomplete="tel" inputmode="tel" placeholder="연락처를 입력해 주세요.">
+            <input type="tel" name="guestPhone" autocomplete="tel" inputmode="tel" placeholder="010-xxxx-xxxx">
           </label>
         </div>