diff --git a/Dockerfile b/Dockerfile
index 6c3c8b9..89008dd 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,4 +1,4 @@
-FROM php:8.1.12RC1-fpm-alpine3.16
+FROM php:8.4.0RC2-zts-alpine3.20
 RUN apk add rsync nginx zlib-dev libpng-dev freetype-dev libjpeg-turbo-dev \
     && docker-php-ext-configure gd --with-freetype --with-jpeg \
     && docker-php-ext-install -j$(nproc) gd \
diff --git a/themes/beauty/controller/SiteController.php b/themes/beauty/controller/SiteController.php
index 8140992..48f2492 100644
--- a/themes/beauty/controller/SiteController.php
+++ b/themes/beauty/controller/SiteController.php
@@ -618,6 +618,7 @@ Class SiteController extends Controller {
         }
 
         //无缓存，则实时生成缩略图
+        $minCacheImgSize = 2 * 1024;       //最小图片尺寸：20Kb
         if (empty($cachedData)) {
             $tmpUrl = parse_url($imgUrl);
             $img_filepath = __DIR__ . '/../../../www' . $tmpUrl['path'];
@@ -631,8 +632,10 @@ Class SiteController extends Controller {
 
                 //返回图片数据
                 header("Content-Type: image/jpeg");
-                header("Cache-Control: max-age={$small_image_client_cache_seconds}");
-                header("Etag: " . md5($img_data));
+                if (strlen($img_data) >= $minCacheImgSize) {
+                    header("Cache-Control: max-age={$small_image_client_cache_seconds}");
+                    header("Etag: " . md5($img_data));
+                }
                 echo $img_data;
                 exit;
             }
@@ -648,8 +651,10 @@ Class SiteController extends Controller {
             }
 
             header("Content-Type: {$imgType}");
-            header("Cache-Control: max-age={$small_image_client_cache_seconds}");
-            header("Etag: {$etag}");
+            if (strlen($img_data) >= $minCacheImgSize) {
+                header("Cache-Control: max-age={$small_image_client_cache_seconds}");
+                header("Etag: {$etag}");
+            }
             echo $img_data;
             exit;
         }