diff --git a/.gitignore b/.gitignore
index 4df3ea6e..36e0e264 100644
--- a/.gitignore
+++ b/.gitignore
@@ -29,6 +29,7 @@ d_pic/*.jpg
 d_pic/*.gif
 d_pic/*.png
 d_pic/*.webp
+d_pic/*.avif
 d_pic/uploaded_image
 
 /dist_js
diff --git a/hwe/sammo/API/Misc/UploadImage.php b/hwe/sammo/API/Misc/UploadImage.php
index e2febed4..36e06043 100644
--- a/hwe/sammo/API/Misc/UploadImage.php
+++ b/hwe/sammo/API/Misc/UploadImage.php
@@ -50,7 +50,7 @@ class UploadImage extends \sammo\BaseAPI
         }
 
         $extension = ltrim($contentType, 'image/');
-        $validExtensions = ['png', 'jpeg', 'jpg', 'gif', 'webp'];
+        $validExtensions = ['png', 'jpeg', 'jpg', 'gif', 'webp', 'avif'];
         if (!in_array(strtolower($extension), $validExtensions)) {
             return '지원하지 않는 이미지 파일입니다: ' . $contentType;
         }
diff --git a/hwe/ts/components/TipTap.vue b/hwe/ts/components/TipTap.vue
index 8164b215..e7476b94 100644
--- a/hwe/ts/components/TipTap.vue
+++ b/hwe/ts/components/TipTap.vue
@@ -279,7 +279,7 @@
         label-cols-lg="3"
         content-cols-sm
         content-cols-lg="7"
-        description="업로드할 파일을 선택해주세요. (jpg, png, gif, webp)"
+        description="업로드할 파일을 선택해주세요. (jpg, png, gif, webp, avif)"
         label="이미지 업로드"
         label-align="right"
         :label-for="`${uuid}_image_upload`"
@@ -288,7 +288,7 @@
           :id="`${uuid}_image_upload`"
           class="form-control"
           type="file"
-          accept=".jpg,.jpeg,.png,.gif,.webp"
+          accept=".jpg,.jpeg,.png,.gif,.webp,.avif"
           @change="chooseImage"
         />
       </BFormGroup>
diff --git a/i_entrance/j_icon_change.php b/i_entrance/j_icon_change.php
index f962802b..afc1e2b1 100644
--- a/i_entrance/j_icon_change.php
+++ b/i_entrance/j_icon_change.php
@@ -21,7 +21,7 @@ $size = getImageSize($image['tmp_name']);
 
 $imageType = $size[2];
 
-$availableImageType = array('.webp'=>IMAGETYPE_WEBP, '.jpg'=>IMAGETYPE_JPEG, '.png'=>IMAGETYPE_PNG, '.gif'=>IMAGETYPE_GIF);
+$availableImageType = array('.avif'=>IMAGETYPE_AVIF, '.webp'=>IMAGETYPE_WEBP, '.jpg'=>IMAGETYPE_JPEG, '.png'=>IMAGETYPE_PNG, '.gif'=>IMAGETYPE_GIF);
 
 $db = RootDB::db();
 $member = $db->queryFirstRow('SELECT `ID`, `PICTURE` FROM `member` WHERE `NO` = %i', $userID);
@@ -48,7 +48,7 @@ if(!is_uploaded_file($image['tmp_name'])) {
     $response['result'] = false;
 } elseif(!$newExt) {
     //확장자 검사
-    $response['reason'] = 'webp, jpg, gif, png 파일이 아닙니다!';
+    $response['reason'] = 'avif, webp, jpg, gif, png 파일이 아닙니다!';
     $response['result'] = false;
 } elseif($image['size'] > 51200) {
     //파일크기 검사
diff --git a/i_entrance/j_set_userlist.php b/i_entrance/j_set_userlist.php
index 04c6905a..a600d0e6 100644
--- a/i_entrance/j_set_userlist.php
+++ b/i_entrance/j_set_userlist.php
@@ -90,7 +90,7 @@ if($action == 'scrub_icon'){
 
     $cnt = 0;
 
-    foreach(glob(AppConf::getUserIconPathFS().'/*.{webp,jpg,png,gif}', GLOB_BRACE) as $filepath){
+    foreach(glob(AppConf::getUserIconPathFS().'/*.{avif,webp,jpg,png,gif}', GLOB_BRACE) as $filepath){
         $filename = basename($filepath);
 
         if (array_key_exists($filename, $usedIcon)) {
diff --git a/i_entrance/user_info.php b/i_entrance/user_info.php
index 3fedde01..26d4bfc8 100644
--- a/i_entrance/user_info.php
+++ b/i_entrance/user_info.php
@@ -143,7 +143,7 @@ require(__DIR__ . '/../vendor/autoload.php');
                         <form name="change_icon_form" id="change_icon_form" method="post" enctype="multipart/form-data">
                             <input class="with_skin" type="text" readonly="readonly" id="image_upload_filename">
                             <button id="image_upload_fake_btn" class="with_skin">찾아보기</button>
-                            <input type="file" id="image_upload" name="image_upload" accept=".webp,.jpg,.jpeg,.png,.gif"><br>
+                            <input type="file" id="image_upload" name="image_upload" accept=".avif,.webp,.jpg,.jpeg,.png,.gif"><br>
                             <input class="with_skin" id="btn_image_submit" type="submit" value="아이콘 변경"> <button id="btn_remove_icon" class="with_skin">아이콘 제거</button>
                         </form>
 
@@ -156,7 +156,7 @@ require(__DIR__ . '/../vendor/autoload.php');
                     <th class="bg1">도움말</th>
                     <td colspan="5" style="text-align:left;padding:8px;">
                         <p style="line-height:1.2em;">
-                            아이콘은 64 x 64픽셀 ~ 128 x 128픽셀 사이, 50KB 이하의 webp, jpg, gif, png 파일만 가능합니다.</p>
+                            아이콘은 64 x 64픽셀 ~ 128 x 128픽셀 사이, 50KB 이하의 avif, webp, jpg, gif, png 파일만 가능합니다.</p>
                         <p style="margin-top:1em;color:magenta;line-height:1.2em;">탈퇴시 1개월간 정보가 보존되며, 1개월간 재가입이 불가능합니다.</span>
                         </p>
                     </td>
diff --git a/webpack.config.cjs b/webpack.config.cjs
index ce7c72dc..3c8a2678 100644
--- a/webpack.config.cjs
+++ b/webpack.config.cjs
@@ -176,7 +176,7 @@ module.exports = (env, argv) => {
                     use: [MiniCssExtractPlugin.loader, 'css-loader', 'postcss-loader', 'sass-loader']
                 },
                 {
-                    test: /\.(png|jpe?g|gif|webp)$/,
+                    test: /\.(png|jpe?g|gif|webp|avif)$/,
                     use: ['file-loader']
                 },
                 {