diff --git a/src/components/input/UserFormInput.vue b/src/components/input/UserFormInput.vue
index d6654f6..12d8b6e 100644
--- a/src/components/input/UserFormInput.vue
+++ b/src/components/input/UserFormInput.vue
@@ -5,7 +5,7 @@
         class="col-md-2 col-form-label"
         >
             {{ title }}
-            <span :class="isEssential ? 'text-red' : 'none'">*</span>
+            <span :class="isEssential ? 'text-red' : 'd-none'">*</span>
         </label>
         <div class="col-md-12">
             <div v-if="useInputGroup" class="input-group mb-3">
@@ -34,7 +34,7 @@
                 />
             </div>
 
-            <div class="invalid-feedback" :class="isAlert ? 'display-block' : ''">{{ title }}를 확인해주세요.</div>
+            <div class="invalid-feedback" :class="isAlert ? 'd-block' : ''">{{ title }}를 확인해주세요.</div>
         </div>
     </div>
 </template>
@@ -97,7 +97,5 @@ const updateInput = function (event) {
 </script>
 
 <style>
-.none {
-    display: none;
-}
+
 </style>