diff --git a/src/main/twirl/gitbucket/core/helper/commitcomment.scala.html b/src/main/twirl/gitbucket/core/helper/commitcomment.scala.html
index 0df308b..d9ff70c 100644
--- a/src/main/twirl/gitbucket/core/helper/commitcomment.scala.html
+++ b/src/main/twirl/gitbucket/core/helper/commitcomment.scala.html
@@ -29,7 +29,7 @@
         }
       </span>
     </div>
-    <div class="box-content commit-commentContent-@comment.commentId">
+    <div class="box-content commit-commentContent-@comment.commentId markdown-body">
       @markdown(comment.content, repository, false, true, true, hasWritePermission)
     </div>
   </div>
diff --git a/src/main/twirl/gitbucket/core/issues/commentlist.scala.html b/src/main/twirl/gitbucket/core/issues/commentlist.scala.html
index 55ed11c..6658819 100644
--- a/src/main/twirl/gitbucket/core/issues/commentlist.scala.html
+++ b/src/main/twirl/gitbucket/core/issues/commentlist.scala.html
@@ -17,7 +17,7 @@
         }
       </span>
     </div>
-    <div class="box-content issue-content" id="issueContent">
+    <div class="box-content issue-content markdown-body" id="issueContent">
       @markdown(issue.get.content getOrElse "No description provided.", repository, false, true, true, hasWritePermission)
     </div>
   </div>
@@ -50,7 +50,7 @@
           @if(comment.action == "commit" && comment.content.split(" ").last.matches("[a-f0-9]{40}")){
             @defining(comment.content.substring(comment.content.length - 40)){ id =>
               <div class="pull-right"><a href="@path/@repository.owner/@repository.name/commit/@id" class="monospace">@id.substring(0, 7)</a></div>
-              @markdown(comment.content.substring(0, comment.content.length - 41), repository, false, true, true, hasWritePermission)
+              <div class="markdown-body">@markdown(comment.content.substring(0, comment.content.length - 41), repository, false, true, true, hasWritePermission)</div>
             }
           } else {
             @if(comment.action == "refer"){
@@ -58,7 +58,7 @@
                 <strong><a href="@path/@repository.owner/@repository.name/issues/@issueId">Issue #@issueId</a>: @rest.mkString(":")</strong>
               }
             } else {
-              @markdown(comment.content, repository, false, true, true, hasWritePermission)
+                <div class="markdown-body">@markdown(comment.content, repository, false, true, true, hasWritePermission)</div>
             }
           }
         </div>
diff --git a/src/main/twirl/gitbucket/core/issues/milestones/list.scala.html b/src/main/twirl/gitbucket/core/issues/milestones/list.scala.html
index fe77565..98e29e4 100644
--- a/src/main/twirl/gitbucket/core/issues/milestones/list.scala.html
+++ b/src/main/twirl/gitbucket/core/issues/milestones/list.scala.html
@@ -75,7 +75,7 @@
               </div>
             </div>
             @if(milestone.description.isDefined){
-              <div class="milestone-description">
+              <div class="milestone-description markdown-body">
                 @markdown(milestone.description.get, repository, false, false)
               </div>
             }