diff --git a/admin/index.go b/admin/index.go
index 2bb69f68..d6f9ddd2 100644
--- a/admin/index.go
+++ b/admin/index.go
@@ -6,6 +6,15 @@ const indextpl = `<!DOCTYPE html>
     <meta charset="utf-8">
     <title>Challenge Forensic - Administration</title>
     <link href="/css/bootstrap.min.css" rel="stylesheet">
+    <style>
+    samp.cksum {
+      overflow-x: hidden;
+      text-overflow: ellipsis;
+      max-width: 20vw;
+      display: inline-block;
+      vertical-align: middle;
+    }
+    </style>
     <base href="{{.urlbase}}">
     <script src="/js/d3.v3.min.js"></script>
   </head>
diff --git a/admin/static/index.html b/admin/static/index.html
index 012768ed..6069d295 100644
--- a/admin/static/index.html
+++ b/admin/static/index.html
@@ -4,6 +4,15 @@
     <meta charset="utf-8">
     <title>Challenge Forensic - Administration</title>
     <link href="/css/bootstrap.min.css" rel="stylesheet">
+    <style>
+    samp.cksum {
+      overflow-x: hidden;
+      text-overflow: ellipsis;
+      max-width: 20vw;
+      display: inline-block;
+      vertical-align: middle;
+    }
+    </style>
     <base href="/">
     <script src="/js/d3.v3.min.js"></script>
   </head>
diff --git a/admin/static/views/exercice.html b/admin/static/views/exercice.html
index 91b81db9..2047d3f1 100644
--- a/admin/static/views/exercice.html
+++ b/admin/static/views/exercice.html
@@ -74,7 +74,7 @@
 	  <a ng-click="deleteFile()" class="btn btn-danger"><span class="glyphicon glyphicon-remove" aria-hidden="true"></span></a>
 	  <button type="submit" class="btn btn-success"><span class="glyphicon glyphicon-ok" aria-hidden="true"></span></button><br>
 	  Taille : <span title="{{ file.size }} octets">{{ file.size | size }}</span><br>
-	  BLAKE2b sum : <samp>{{ file.checksum | cksum }}</samp>
+	  BLAKE2b sum : <samp class="cksum">{{ file.checksum | cksum }}</samp>
 	</form>
       </div>
     </div>
