diff --git a/templates/post.html b/templates/post.html
index c23d9b45..6836a70d 100644
--- a/templates/post.html
+++ b/templates/post.html
@@ -198,7 +198,7 @@ <h1 class="post-title" th:text="${post.spec.title}"></h1>
                     <div th:if="${postCursor.hasPrevious()}" th:class="${postCursor.hasNext()==false} ? 'prev-post pull-full ' : 'prev-post pull-left'">
                         <a th:if="${postCursor.hasPrevious()}" th:href="@{${postCursor.previous.status.permalink}}">
                             <img alt="cover" id="preimg" class="nolazyload"
-                                 th:with="img = ${#strings.isEmpty(postCursor.previous.spec.cover) ? postRandomImg+postCursor.previous.spec.title : postCursor.previous.spec.cover}"
+                                 th:with="img = ${#strings.isEmpty(postCursor.previous.spec.cover) ? postRandomImg+postCursor.previous.spec.title : thumbnail.gen(postCursor.previous.spec.cover, 'm')}"
                                  th:src="${isLazyload ? loadingImg : img}"
 
                                  th:data-lazy-src="${ isLazyload ? img : ''}">
@@ -211,7 +211,7 @@ <h1 class="post-title" th:text="${post.spec.title}"></h1>
                     <div th:if="${postCursor.hasNext()}" th:class="${postCursor.hasPrevious()==false} ? 'next-post pull-full ':'next-post pull-right'">
                         <a th:if="${postCursor.hasNext()}" th:href="@{${postCursor.next.status.permalink}}">
                             <img alt="cover" id="preimg" class="nolazyload"
-                                 th:with="img = ${#strings.isEmpty(postCursor.next.spec.cover) ? postRandomImg+postCursor.next.spec.title : postCursor.next.spec.cover}"
+                                 th:with="img = ${#strings.isEmpty(postCursor.next.spec.cover) ? postRandomImg+postCursor.next.spec.title : thumbnail.gen(postCursor.next.spec.cover, 'm')}"
                                  th:src="${isLazyload ? loadingImg : img}"
                                  th:data-lazy-src="${ isLazyload ? img : ''}">
                             <div class="pagination-info">