diff --git a/src/index.html b/src/index.html
index 821abbee..27ebd7e7 100644
--- a/src/index.html
+++ b/src/index.html
@@ -22,7 +22,7 @@ <h2>승객 선택</h2>
           </div>
         </div>
         <div class="spin-input-container adult-passenger-spin">
-          <button type="button" class="spin-button" data-step="-1" aria-label="성인 탑승자 한 명 줄이기">-</button>
+          <button type="button" class="spin-button" data-step="-1" aria-label="성인 탑승자 한 명 줄이기" aria-disabled="true">-</button>
           <input
             id="adult-passenger-count-input"
             class="passenger-count-input"
@@ -31,7 +31,7 @@ <h2>승객 선택</h2>
             max="3"
             value="0"
           ></input>
-          <button type="button" class="spin-button" data-step="1" aria-label="성인 탑승자 한 명 늘리기">+</button>
+          <button type="button" class="spin-button" data-step="1" aria-label="성인 탑승자 한 명 늘리기" aria-disabled="true">+</button>
           <div class="aria-hidden spin-input-aria-live-message"></div>
         </div>
       </div>